pioneer app radio function

Hi, i am trying to get some info on how well the app function works for the pioneer 2550bt head unit. my boss is interested in buying one as he really liked mine and liked the idea of being able to use his iphone through the rgb connection at the back. his question to me that i cant seem to find the answer to is will it play music and give voice directions at the same time ,ie streaming music via bluetooth or pandora and having the gps app play over top of the music like in a new car? Any help with this would be greatly appreaciated. thanks in advance,Jake.

Anybody????

I know this has become my standard response, but I would try asking this on a pioneer specific forum as well avic411 for example. Or calling pioneer directly might work as well.To master and control electricity is perfection. *evil laugh*