Garmin Forerunner 305 Wrist-Mounted GPS Navigator and Personal Training Device with Heart Rate Monitor.

The big news about the Forerunner 305 is that it features an integrated, high-sensitivity SiRFstar III GPS receiver. It means that the 305's ability to both track, and maintain a lock on, your position is better than anything before it. After an intial battery charge, the tester had the 305 on his wrist and was tracking speed and distance with GPS satellites within 3 minutes.

Let's say that next time we you already used the 305, satellite acquisition was nearly instantaneous. A run through dense trees didn't faze the unit either; tracking remained true and steady. Performance on a bike was equally impressive.

The display is crisp and has one outstanding feature:
1) The information presented on the various pages can be completely user-customized.
2) The default screen layout is rather poor, but in just a few steps I could replace it with the information I wanted to see while I run.
3) There are almost 40 different data fields you can choose from for display. Examples: current pace, average lap pace, average run pace, heartrate, distance.

Opsss.... not only that:

Garmin's motionbased web site will correct your elevation data, but this is a basic function of the device, not something you should need to pay extra for; 2) instantaneous pace readings are meaningless, jumping 20-30% in either direction from one second to the next -- lap pace is more useful, as long as your laps are roughly 3 minutes or longer.

The best thing about this gadget is the 305 is first and foremost a training tool, and its ability to organize a ton of data types into a user experience that is intuitive and simple is no small feat.