I love Samsung Galaxies and don't plan to ever switch, but I have had some issues with my phone. Sometimes there's a slight delay. Also, the battery life after the first year suffered a lot. I took it in and they noticed there was an issue and ordered me a new one, but within a week the battery started to drain fast on that one too. The camera and audio quality is nice though. Sometimes I can tell the functions on my phone aren't working though. It definitely has it's pros and cons like I think any phone has.
The phone is a perfect size. Fits in my hand. The screen is super responsive to the touch. The buttons are well placed. Its really thin as well. Which I like.
The phone does have a couple shortcomings, but overall it is not too bad. The phone is fast and nimble. Even though the back is sealed, you can adjust.
I love my phone for multiple reasons. The first being the way it looks and feels when I use it. 2nd is the ease of everything. 3rd is just simply I love Samsung Galaxy products and won't ever use anything else again!!