I felt compelled to write a review, because I am disturbed with what some other reviewers are publishing. This is the best watch of it's kind I have owned, and as long as a purchaser understands what it does, and it's limitations, I think they will be more than satisfied. It may be that this watch will not meet their needs, but it should not be a cause to deliver a poor rating.
I have owned the Forerunner 305, the 201, the Timex GPS and a Polar, so I have years of experience. Since I do triathlons, I was most looking forward to the waterproof controls, and 20 hour battery. The charger is a bit funky design, but for me it seems to work just fine. My battery has been lasting at least 16 hours--I haven't tested it further before recharging. One issue that I had with the 305 also, though: the watch should be TURNED OFF while you are charging. If not, as soon as you disconnect the charger, since the watch is ON, it will start "discharging" (as it does normally while it is on. I have been caught several times with a depleted battery on my 305 because of this quirk--I think the watches should be programmed to automatically turn themselves off when the charger is connected).
I have used the new watch swimming, biking and running and hiking, and I am pleased with the performance for each sport. One reviewer pointed out that there should be a "swim" mode--I agree, but I think Garmin may have avoided that mode because the GPS does not work well in the water. Several reviewers complained about that, however Garmin does write on their website AND in their manual that the GPS does not work well in the water (I don't know that I would blame that on Garmin--probably the technology is just not there yet--besides, GPS signals do not penetrate water.) In fact, I did NOT get an accurate GPS distance reading for open water swimming, but it did map my COURSE correctly, albeit with a lot of zig-zags (I know I can't swim in a straight line, but I am not THAT bad).
The biking portion works great. The Garmin matches pretty closely with the distance measured on my bike computer (I don't have the Garmin bike sensor--I want that and the quick-release mount for my next birthday). Of course it also tracks speed, altitude, heart rate, etc. (I used the heart monitor strap from my 305).
Running works well also, basically same as biking although I do set up the display screens differently.
Other, useful new features I have noticed:
1. The watch locks onto satellites more quickly than my 305
2. The watch vibrates, although I wonder how this affects battery life. For instance it vibrates every lap (if I set it) so I know I have completed an autolap without having to look at the watch.
3. The software is more refined (lots of small fixes. For instance the settings function lets me know what sport mode I am in--although I think this could still be made easier and less confusing. And the time zone can be put on automatic--I always wondered why they couldn't do this before--the watch knows where it is for gosh sakes. And there are extra custom screens if you want them--statistic hounds take note.)
4. Wireless data upload. Very nice! Their new "Garmin Connect" site is also pretty useful, and the data can be uploaded directly to the Internet.
5. The 310XT is not much smaller or lighter than the 305 (according to the specs), but it FEELS MUCH smaller and lighter.
6. There is a progress bar for the battery charging. I would like to be able to see how much time is LEFT in my battery--I wish Garmin would add this.
In summary, I think this is far and away the best GPS watch Garmin has made, and is especially appropriate for triathletes (despite the swimming issue). You DO need to become accustomed to using the watch. Although I do not think it is hard to use, you SHOULD read the manual. At least you do not have to keep RE-reading the manual like I do for some other gadgets. I do think this watch is way overpriced, but I am a gadget freak, and I'm sure the price will come down over time, like it did for the 305 (which is a great deal, now, btw, if you don't need a 20 hour battery-life and a waterproof stopwatch :) Garmin Forerunner 310XT Waterproof Running GPS With USB ANT Stick
This device has been represented as a triathlete's watch and the first swim proof GPS watch. If you watch the video from Garmin or see any of the advertisements, Garmin leads you to believe that this watch will collect reliable data for all 3 multisport events. It is reasonable for someone to assume this watch can be worn in a race and collect GPS data in the water, since, of course, SWIMMING is the first event in a triathlon.
If you are considering buying this watch realize the following:
-This device does not collect usable data in the water, period (other than time, which any $20 waterproof watch can collect in a much smaller form factor). No heart rate data and totally unusable and inaccurate GPS data while in the water.
-There are preset modes for run, bike, and "other", in which "other" shows a person on skis (explain that one?). They intentionally omit a category for swimming, despite advertising that this watch is for triathletes (see the photo I added under product photos).
-You will need to purchase a separate quick release kit if you want to use this watch on a bike. It does not get accurate data on a bike if you are wearing in on your wrist. It auto pauses, then unpauses for most of the time I am riding if I wear it on my wrist -- even if I have it set to only auto pause when completely stopped. The quick release kit IS NOT the more common one for the 205 and 305 Garmin 010-10889-00 Forerunner 305/205 Quick Release Kit, so do not buy that one. They have made a new one for this watch and most places do not have it in stock yet. As of the date I am writing this review, it is not yet available on Amazon.com. Go to Garmin's website and look under the accessories tab for this watch. You will see a different model number. I have confirmed this with customer service. The part number for the proper quick release kit is: 010-11215-00. Google it.
-If you want foot cadence or the ability to track distance indoors and assume you get it for spending $400 on this device, think again. You will have to buy a separate foot pod which costs $80-100, depending on where you buy it (earlier Garmin Forerunner watch kits included foot pods). Garmin Foot Pod SDM4 (ANT+)
-The watch is large and sits high on top of the wrist (they packed 20 hours of batter life into this watch), so to wear it under your wetsuit will let water in the wetsuit, or you will have to wear it on top of (or crammed in front of) the wetsuit, which will not allow you to remove your wetsuit without first removing the watch (thus adding time to your transition and sort of negating that whole "triathlete" angle). You can see a photo of this watch on my wrist under the photos section of the product.
-There is no way to turn off GPS tracking for only one of the 3 events in multisport mode. Therefore you will always either have incorrect GPS data recording for the swimming mode (or, actually "other", since there is no "swim" mode, as previously mentioned). I have called customer support and they confirm this. Their solution was to turn off GPS while I am swimming, then reset and manually start a new timer and mode during transition 1 for my bike event. I'll let you be the judge of how to take that advice.
So, in conclusion, if you want to setup this watch for a bike and run, and want the ability to wear the watch in the water before hand (and no start it unless you want some incorrect distance data included), you will need to buy:
$400 - the Garmin 310XT with HR
$25 - quick release mount kit (for wrist and bike) (no link in Amazon yet)
$80-100 - foot pod (if you want cadence)
Garmin Foot Pod SDM4 (ANT+)
$35-50 - speed/cadence sensor (if you want cadence for the bike)
GARMIN 010-10644-00 Speed/Cadence Sensor
You'll be into it for $575 retail. Garmin, you did us wrong on this one. Some of us are willing to spend this kind of money on a product if it proves to do what it advertises itself to do. We're not asking it to do anything more than perform as advertised. I realize your fine print saves you from lawsuits, but it doesn't gain you repeat customers. It sends them over to Polar.
[EDIT: I have edited the title of this review to what it currently reads from "Misleading: Not a Triathlete's Watch," because it seems that Garmin has somewhat softened their advertising and marketing surrounding this watch. I purchased this watch when it first came out in 2009, and at the time the marketing videos and advertising in triathlon magazines mentioned nothing about the fact that it doesn't track GPS data in the water, and in fact seemed to lead the consumer into believe it does. That advertising has since softened.]'
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