To be honest - I am not really interested in Bluetooth in my car - I just wanted a solution that would play my MP3's with random order and nothing more.
The BLOW FM transmitter I use - besides having Bluetooth - also have a builtin microphone - so I may connect phone to it and even use it for loud phone talks ... but I really prefer current MP3's on USB and just play 'setup'.
... and I do not see any difference between CD quality or this FM transmitter quality ... but I am not an audiophile either - so maybe there will be some people that hear the difference. Having 40 years at my neck I will hear less and less frequencies so I believe that will not be a problem :)
Regards,
vermaden