Sony MEX-BT3150U

Hi Guys/Gals

Did any of you maybe fit these headunit in your e46.

Main questions are:

What do you think of this Headunit.

if i can make calls without the microphone (not supplied) and still be heard when talking to someone. (busy ordering the microphone)

What do i need to be able to use my steering wheel volume buttons with the headunit. (says on box it is steering wheel remote ready)

What do you guys think of the single din fascia panel for the E46 that they sell at autostyle.

Thanks a lot.