Nooo not got 550 anymore just the dr 500 .Been trying to have a rear cam that does not mess with my DAB so going to try the Cowon. The other problem with the 550 is the loose connection to the rear and front cam. there is no way you can plug in and out more than a few times. If it starts off to tight then you can run the risk of pulling the socket out, that's what happened to me in January . If it survives the first unplug then it becomes loose and you lose connection with the rear cam. In the end I never push the plug in all the way. As the 500 does not have rear cam it works and does not suffer these faults. How the 550 ever got into production with this hit and miss connection I will never know. As for buying a sleeve to put the front cam in forget it once its plugged in leave it.