I wanted to wait a few months before writing this review. I purchased this 5 months ago after careful consideration. I do like Samsung products. Originally I only got 3½ days of battery life which was extremely annoying. I did overlook that with the hope that a software upgrade would arrive some day to fix that and other blatant issues and they certainly did!I now get 8 days of battery life which is more than double the original. It now has a battery meter on the display (if you choose do display one). Prior you had to go into the app on your phone to see battery life, which was stupid at best. Now it's on the fit. Now there's many more features and faces you can tailor the display for. Originally I pared my display items to heart rate, steps and sleep to get my 3½ days of battery life. Now I have that and more and the battery last SO much longer.I got mine in summer and swim, kayaked and showered with it. It still works great. I take it off only to charge it. It does have a swim mode, which I think turns off the display so it does not come on with every swim stroke. But it is waterproof as I shower daily with it.You can now display your calendar agenda, control music, display weather plus all the usual and more. I would guess more will be coming with future software upgrades to the Fit.I used to have a Garmin Vivosmart HR+ and this now is a huge improvement. The display is beautiful and crystal clear. Performance wise with steps I think it is very generous. Sleep tracking it seems dead on. Heart rate for me is important to watch and it's close enough for what I want/need.It still can be improved in a few main categories: one is screen brightness. It needs to adapt to brighter in the sun and much dimmer at night and even dimmer while in the total dark like looking at it in the middle of the night in bed. But I'm patient as the software upgrades are huge improvements every time.It also needs a slightly better band. The band is pretty good. But everyone one in a while I find it loose or very loose. It's an unusual design that does work. But I would prefer to see the usual adjustable watch clasp or even a material band with Velcro like the kind that some Luminox watches have.Charging time is now around 2 hours to charge to full. That's MUCH better than originally as it needed 4+ hours. Half that is much better.All in all it now deserves it's 5 stars in all categories. And I'm sure even more improvements and enhancements thru software upgrades for the band will come out in the future. Just make sure to check for software updates every few months. A new one has been coming out once a month.I highly recommend the Galaxy Fit. It's an excellent activity tracker with excellent battery life and customization.