The reviews for this are right, if you want the best android watch AND own a Samsung, this is a no brainer. The main downside battery is pretty woeful and the watch will need charged every day. I turned off most of the continuous measurement of heart, stress etc, and turned off auto workout mode and at most I've had 1 day 5hrs on a single charge. This may be the same for higher spec watches like the apple watch also, but going from fitness bands and lower spec watches like the galaxy gear fit and the honor magicwatch 2 (both had an at least 5 day battery life), this will take some getting used to.