I've just bought one so I'm interested in people's opinions. Online reviews seem very good. I wanted a simple, no frills GPS watch and Garmin seems to be the brand name always mentioned. I find mine very very simple to use but im only a time/distance person at the moment. I bought the larger size in orange and it looks nice as far as this kind of watch can look
I have Garmin Forerunner 110 - the pink and grey one. I love it. I use it for distance, time and pace when I am running. Then when I'm home, I upload the date on the website. I look at my splits (just out of interest or if I'd been trying a bit of interval training) and the calorie burn. All very simple to use. I haven't got into the heart rate monitor.
You get lots of data - the splits for each k, lots of information on pace, elevation loss and gains, map of your run, weather and if I used the HRM there would be even more. To be honest there is a ton of stuff I haven't explored properly.
I've had one for a couple of months. Very good and simple to use.
The only thing is it can sometimes take a while to find a signal. Never lost it halfway through or anything but it's frustrating having done a warm up, having to stand still with my wrist in the air before I can run (I think the signal times out if you don't use it immediately and I don't want to time/measure my warm up so don't want to find the signal beforehand).