Overall this phone is fantastic! The only thing I would love to change is how sensitive the touch screen is. I notice if I even wave a finervous over the screen something happens that I didn't want to. Other than that I love my phone. Just got a new case for it and screen protector!
The Galaxy S6 is a great improvement from its predecessors in the aesthetic department. Very good looking, however, I was disappointed to know that the Emerald Green color was not available in the US. Still, the Platinum Gold is really nice and I am very happy with it.
The GS6 has a beautiful screen for watching movies and videos. I'm not much of a mobile gamer, but I have played some demanding games on my phone and they looked really good and I did not experience any issues when playing them.
Just like with the games, I don't remember ever experiencing any issues when running an app, except for the occasional crashes that happen in Android. I think that's a big testament about the processing power of the GS6.
Another big improvement on the GS6 is the camera. I love shooting videos on QHD and HDR makes eveything so neat. Also HD 60FPS videos look really cool. I have so much fun with this camera, whether it's day or night since it works good on low light conditions which is great because I'm not a fan of the flash so I try to avoid it as much as possible.
The GS6 is not without faults and I think its biggest issues are battery and memory. The battery on the GS6 is good enough to last me a day of regular use, at least it was in the beginning. Over time the batery life of my GS6 decreased considerably, I think mainly because of my constantly charging my phone overnight. I don't think this is necessarily Samsung's fault, but the fact that I can't change a worn-out battery is a problem for me. On the bright side of things there's fast charging technology which I love, unfortunately, I don't normally carry a charger everywhere I go.
There is also the Ultra Power Safe Mode (UPSM), which can greatly extent your battery life by shutting off background apps and services and basically reducing your smartphone to a 1999 flip phone. But it comes in handy when I'm down to 5%.
The other problem I have with the GS6 is the fixed memory. I don't like the fact that I'm stuck with 64GB since that's what I could afford at the time I purchased it. Most people will be fine with 64GB, very few might get away with 32GB, but if you can afford the 128GB I would recommend you go with it. The internal memory is there to improve performance, but I'm not sure it's worth it.
Overall, the Samsung Galaxy S6 is a very good looking phone with amazing perfomance, a feature-packed camera, and beautiful display.