I’ve been using galaxy s6 from past 2 years and haven’t face any problems yet accept from storage because it does not have memory card slot
Pros
Corning gorilla glass 4 is crisp and clear
5.1 Touch screen is perfect to handle
Super Amoled capacitive touchscreen works fluently
16mp auto focus camera click amazing pictures ( hd quality )
Front facing camera is mind blowing
Fingerprint sensor works perfectly without any problem
Cons
No sd card slot
Final verdict
In my opinion if atorage is not your problem then you should definitely buy this phone its a keeper.