In parallel, I use Samsung watch 4, there is something to compare with. Simple functionality, nothing superfluous, plus the ability to answer calls, the quality of materials (glass, body) pleased, fairly accurate measurements (the discrepancies with Samsung are minimal), autonomy is about 5 days (including everything, no savings). I took it exclusively for training (the price turned out to be sweet, with discounts they cost 14200). Samsung is certainly out of competition, if not for its huge minus - autonomy. I am satisfied with the purchase.