TouchWiz, Samsung’s Android overlay, was never the best interface, but at least it’s been cleaned up a bit. It’s still got the same cartoony look, with garish colours, and the options are still slightly complicated, but it’s a far cry from that seen on the Samsung Galaxy S4.
The main changes are in the menus. Samsung has removed unnecessary dialog boxes, and other apps have been polished. The Contacts screen has been scrubbed of tabs, instead offering you the chance to just interact with the people you want to. The icons have been flattened, too, with Google’s Material Design from Lollipop stretching further through the phone.