Pros It arrived quickly.
Cons Tough to get satelites in trees or on streets with even three story buildings.
Inconsistent for distances... varies as much as 300 feet in the same 1.5 mile course.
Heart rate monitor was irradic when new and now doesn't work at all.
Garmin support is non
Summary Doesn't really do much of what it says it will do.
Pros Easy to use, Syncs to computer and websites, Great for tracking workouts
Cons A little bulky
Summary I started using the forerunner 305 in January to track my training. Its the first GPS watch I have owned and it was little intimidating when I took it out of the box for the first time. I flipped through the owners manuel and figured out the basic functions. The screen is big and displays multiple data fields, which you can customize (Time, Heart rate, Speed, Pace, Cal.. etc). This model also has a chest strap included so heart rate can be tracked. I have read that a lot of people have trouble with the GPS signal, but I have not had any trouble in the city or country. I could not use the softwhere included due to having a Mac, but I found a compatible training program and there is a garmin website (http://connect.garmin.com/?s=1) that you can upload activities. I feel like everyday I learn some new function that the watch can do. I love this watch and would recommend it to anyone who is looking for a GPS watch and does not mind it being a little bulky.
Pros Set of features available
Value for money
Cons Nothing special to sign, maybe it could be smaller but with so many features I'm more than happy.
Pros Speed recorder
Cons Lost functionality
Summary If you are considering buying a Garmin Watch, you should be warned that this product had a major change in November of 2010, any review before that time needs to be taken with a grain of salt.
Garmin changed their maps providers and got rid of Google Maps and now this product has lost a lot of functionality. Check out this link to a Facebook Group that Garmin users set up: http://www.facebook.com/home.php?sk=group_177724018904812 to see what users of this product are saying now. Alternative products are also discussed there.
Pros Great tool with lots of features.
Knowing exactly how slow/fast you're going makes it much easier to push yourself.
Cons Satellite connection time is inconsistent and sometimes takes an absurdly long time.
Summary I haven't had any problems with dropped reception like many other reviewers have had. Once it gets a signal it always stays connected. However, the length of time it takes to require the signal varies a lot. Occasionally it will pick it up in the first few minutes, but It nearly always takes longer. Which is frustrating, because I don't want to begin collecting data when I'm already 2 or more miles into my run.
I've had it get reception in a few seconds.
I've also run for 50 minutes before it connected.
I've started turning it on and leaving it on my windowsill 20 minutes before I run so that it has a chance to lock on before I step out the door.
Overall, it's a great tool, and I know it has helped my training considerably, but if you're going to buy it you may have to deal with an average wait of 10-15 minutes before using it. I of course have no idea how good reception is in other areas, but from reading other reviews it seems to be uniformly sketchy.
I'd still much rather run with it than without it, but being forced to wait outside for 10-15 minutes or lose the first 2 miles worth of data has been frustrating.