I used to own a D3, and the bluetooth was good enough that most people couldn't tell I was using a handsfree system. But it was stolen. The insurance company replaced it with an F900BT.
And I've found the bluetooth to simply suck. On the other end, callers hear wind/hissing, even when the car is off, windows up, no other sounds but my voice. On my end, I head lots of digital noise, and often times compression cuts that result in being able to hear every 3rd word the other person says. (I've tried moving the mic, replacing the mic, even using a Parrot mic, all with the same result)
I looked at using a Parrot unit tied into the system, but my installer says the better option would be to use the CD-BTB200 module. I wasn't aware you could do that, and it's not listed as being compatible. But that could just be because Pioneer sees listing it as unneccessary, with built in bluetooth and all.
Has anyone tried it? I hate to drop the money on the module just to find out I can't use it. I'm not sure how I'd tell the F900 to use the external rather than the internal.