Summary: Before this watch, I had the Nike fuel band and nike gps watch. Let me just say that this watch is way better. It has all three functions of biking, swimming, and running. Also, it is waterproof (as long as you don't press the buttons underwater), which is a huge plus. Really easy to use.
Summary: I owned this GPS watch from almost 2 years. I can't say it is perfect but truly no GPS watch is. Recently I used it in an MTB expedition where we lost the trail and had to walk carrying the bikes throught a dense vegetation for several hours. I managed to guide us back to the parking place thanks to my Timex GPS watch. Some bikers including myself where already severly dehidrated. Since then I carry it with me fully charged everywere I go with my bike. Pros: 1.
Summary: Great watch for Ironman athletes. For biking a sensor and magnet is needed to get the full benefits. The heart rate monitor does not work in the water but I do not think any do. The monitor works great tracking runs. Altogether I have 2 and use them in races (1 for the bike and then I use the other with the battery fully charged for the run).