I'll try not to be too harsh on this unit (as I bought a 2nd hand one off ebay) but its difficult not to be with all the problems I have encounterd. Refusing to play certain discs, mp3 discs skipping and the unit would quite often freeze up for no apparent reason. After a bit of research I found out that the problems lie with the firmware on the unit, with most issues delt with by the release of the BT5100 (the same unit but with the updated firmware.) Despite all of this, it was a stunning unit with a superb display, excellent handsfree bluetooth quality and great sound (when it was working properly that is!). Works fantastic with a bluetooth wireless adaptor and your ipod! If I had to make the desicion again I would go for the BT5100 because this is a truly excellent unit bar the original firmware which cannot be updated.
The MEX-BT5000 car audio head unit is designed for the truly mobile lifestyle. The first Sony head unit with Bluetooth wireless technology, it automatically links to any Bluetooth mobile phone and provides handsfree calls with crystal clear sound. Phone book data from the handset also appears on the BT5000's high-visibility screen, so you can make and receive calls during a journey without even taking your phone out of your pocket. Support for the Bluetooth OPP (Object Push Protocol) also allows the wireless transfer of up to fifty phone book contacts to the head unit itself.
An integrated microphone in the unit picks up the user's voice and removes the need for any further wiring within the car, greatly simplifying installation. Stylishly minimal design and a full motion fluorescent (FL) display gives the BT5000 a highly distinctive look very different to previous Sony head units.
Smart handsfree isn't all the BT5000 can do. Show it a mobile phone or music player that supports Bluetooth audio streaming and it will retrieve and play music too. The head unit offers essential playback control (Play/Pause, Skip, fast forward/back) over the remote source, placing your music collection right at your fingertips.