Anyone have a Sprint Booster Assy?
 

Curious about these guys. For my 06 4.8is, it would cost $300. I was wondering if anyone has gone before me and can give an honest opinion.

Thanks in advance.

I was going to suggest keeping it to the thread already started, but I see you found it:

http://www.xoutpost.com/bmw-sav-foru...booster-3.html

There are lots of honest opinions there.