My son has bought a Mass Fidelity Relay, and although he doesn't experienced exactly the same problems with Bleutooth as I do with my V90-BLU, it's perfectly clear that bleutooth has his limitations as an audio connection. You can get CD-quality, but you have to remove, or turn off, all the WiFi and Bleutooth radio's in the neighbourhood. Otherwise the sound quality will be influenced in a negative way.
No problem when listening to 128kbps MP3's, but with better material you have to keep this limitations in mind.