I've owned a Rocketfish Bluetooth receiver for perhaps a year now. I also tried out an Audioengine Bluetooth receiver. I gave back the Audioengine as for some reason in my application my Bluetooth sourced needed to be incredibly close- the Rocketfish is better in this regard. I use Tunein Radio to access internet radio stations. The sound is ok.
Lately, I went a different route. I use my MacBook Pro, go to Tunein Radio, and via USB, connect the laptop to my DAC (the Rocketfish is also connected to my DAC). I'm finding that the hard wired laptop to DAC method title better sound. Yet given a clean FM signal, my tuner is capable of more vivid sonics.
Overall, I will use whichever source gives me static-free results. For instance, now I'm listening to Swiss Jazz, which in impossible for me to receive otherwise. But WBGO? I'm on the fringe of the reception area. Sometimes sounds ok on air, sometimes sounds miserable. Wish they broadcast from the WTC and at higher power.