Watch purchased there 2 weeks and what a disappointment! Yes the watch is ergonomic (one button that allows you to browse all menus), yes the GPS is reliable and very fast (hence the 2 stars). But the big black dot - which is nevertheless what made me buy the watch as many others - is the cardio sensor: as soon as one more short 1/4 hours that permanently disconnects due sweat. You must remove the current shows (what a joy!), And wipe his wrist, and hand. and there it goes again ... for a few minutes before sarrêter again. On a course of 1 hour, I finally gave up after 40 minutes after 5 or 6 disconnections. TomTom The forums are filled with unhappy about this, and other e-commerce sites: TomTom will hopefully reflect that. Oh by the way if you have not Apple product, forget any synchronization Android, TomTom nenvisageant not compatible app to launch until at least 3 months. As it stands, I frankly do not recommend buying this watch as the major concern has not been resolved.