So I have a skinned 650 and the new Seidio leather flip case. It's not bad, but they made a HUGE design mistake: you can't really use a headphone/set with it. THere is a hole in the case for the jack, but if you need to take the phone out of the case to make a call, change your MP3 or in any way touch the screen, you must disconnect the cord. A better design would be to turn the unit upside down in the holster. This would eliminate the need to disconnect the headset AND IT WOULD BE MORE ERGONOMIC! As it is, you must rather awkwardly flip the phone around in your hand upon removing it from the case in order to use the unit. If one could put the unit upside down in the case, it would come out of the holster in a manner that eliminated this little move.