I have the Galaxy S6 Edge 64GB Black. It definitely has advantages like the camera is awesome, root and its nice having a file system. I know the android guys get mad when you say this but its not a replacement for my iPhone 6+. The reasons are for one the screen just seems small, the battery life is no comparison (iPhone 6+ blows it away), and at times (yes even with 8 cores) it can lag. I need to capture a photo quickly and the camera app locked up and ended up taking a picture of the ground. The edge thing seems cool but I noticed that when the "edge" is on the entire screen was on thats got to be a battery killer. The device feels great in the hand. One thing I never liked about android is how all the icons look different, some are round, some are square, some are square with round corners, I wish they looked more uniform. In the end my iPhone is my go to phone. Thats just me and this is all just opinion...
you can change the icons on android... get an icon pack or a launcher. also my device doesn't lag at all.