I don;t use cases with my phones normally, but I find the edge to be a little PITA sometimes, like when using the dialer to enter a number like "press 1 for xxxxx, press 2 for ccccc" etc. The phone dialer takes up most of the screen and when holding the phone with the wrap around edges, any time a part of my hand just touches an edge the phone sees it as a touch and, in the case of the dialer and even the keypad sometimes, it shows as a number press or letter press.
Fred