This GPS watch gives me the functionality I expected. I use it for training, mainly for the times / distances functions. The different configurable screens can display all relevant information during the sessions, including split (speed, average speed, elapsed time, distance, exposure time, lap speed, ...). The backlight of the screen shows the same information when we train at night! I use less cardio functions, but again, all the info is readily available on the screen, mixable with GPS info. Question congestion, even if the housing is a bit large, it is very light. Moreover, he does not fear the rain. Finally, the battery of the watch is rechargeable and autonomy of ten hours, more than enough. It is possible to unload its PC workouts. I am very pleased with this acquisition.