I think the "volume-gui" @okinear refers to is this: What he wants to say is to access this screen even without turning the volume knob (as you could also control the volume in this screen by swiping up/down), as it apparently only shows up when you use the knob. The "free rubber" (silicone case) actually is useful, as it makes the AP80 slip resistant (the back of the AP80 has a glossy finish, so there's a chance that it might slip out). I do agree that it's a bit thin, though. About the screen protector, yes, they are inconsistent on how they apply the screen protectors on the units they delivered. Some are applied perfectly, and some aren't, like yours and mine. The red AP80 they delivered to me had two dust bubbles on it, but I managed to remove them with clear tape.