Nike GPS sportwatch (TomTom) - really accurate with GPS; if you also use the sensor (same as Nike+) then it's supposed to calibrate it when you run with the GPS so that if you need to run without the GPS (e.g.: on treadmill) then it's more accurate (haven't had a chance to confirm this yet). Good thing for me was I could continue logging my runs on the Nike+ website & keep my history of runs, totals, etc. - new version of web site is being released in a few months. Had the GPS watch it for a few months now - no problems, works well, very happy with it - when I run the same route, it's inevitably the same distance or if it's different, it's only by 10 or 20 metres. You can add a heart monitor, but I haven't done that.

I have the Garmin Forerunner 110 which has suited me perfectly for the last 6 months. My partner has one as well and we find them extremely acurate - they both click over almost at the same time (each km they beep). The light function is handy, its easy to upload, the maps are acurate and handy and the pace/average splits are great. I have the heart rate monitor as well but dont like wearing it (I find a sports bra is enough in that area!).

It has suited me well and does all the basics perfectly. My problem with it now is not so much to do with the watch, but how I train. I do alot of hill sprints and other interval type runs 3 days a week. The 110 allows you to manually set a new lap each time, but its not really simple, plus it doesnt allow you to see your previous laps/efforts etc. Also since running a half marathon I am looking for something that beeps and keeps my pace on track. Im going to upgrade soon and will be getting the full bells and whistles - the 610 touch screen!

I bought my Garmin Forerunner 305 about 2 1/2 years ago. I do a lot of trail running, road running and cycling and use it for all three (I live a rural area).

Before I go any further - I was having some issues with it recently and had it repaired. Actually I got a whole new watch, refurbished, to the tune of $100 (taxes, postage, etc, etc). I was kind of reluctant to get it fixed thinking I could put that $100 to another watch, but after looking at what was on the market, what I've got (it gets excellent reviews) and did I want to spend an additonal $300, I decided it was worth it.

It is GPS and came with a heart rate monitor, usb & wall charger and it's own program. The reason I mention the program, is I believe it's one of the Timex watches comes with a program, but only for like 3 months and then you have to pay to use (upload) your data to their program - no thanks.

I was totally lost without mine while it was down. I can set up intervals (either distance or time or a mix), it has a virtual partner that will encourage you to keep up to, I can upload workouts, courses and even connect what I ran into Google Earth. Actually, it has so much, I really haven't made effective use of it.

As I said, it's discontinued, but if you can get one - go for it. I'm not sure if the newer models are up to snuff, but I still am able to get updates for the program and Garmin has been really good to deal with.

Another option - one of the girls I ran with uses a free GPS app on her phone and we were using it while my watch was in for repairs and it was really cool. It talked to us telling us our pace and gave us our distance, plus all the other benefits 'dorseykm' stated.

Good luck with your decision.

I echo the sentiments about the Garmin Forerunner Series. I have the 305 as well and it's worth its weight in gold. Check out REI, I got mine there for cheaper than anywhere else I have seen.

The bezel on my Garmin locks if you touch both buttons together. That was the one thing I had to get used to. I'm totally in love with mine and use it for running, biking, cross country skiing... I recommend the foot pods as well.