Biggest issue is the app grabs 800+ MB of internal space before even logging in - on top of the 200 MB for the app itself. It uses over a GB of internal phone memory without even playing a single song! It should at least try to use the SD card. Other than that the GUI response is slow. Sometimes (every couple of weeks maybe) it won't play music at all. It lets me see songs and press play but then hangs. Restarting the app doesn't help. Doesn't matter if the phone is on WiFi or cellular.