I am looking to keep my stock radio intact and functioning, but I want to be able to play music from my smartphone as well. I found a product called Out Of Sight Audio MKII. I was wondering if anyone had any experience with this. I am not seeing many reviews on line for it. It claims to do exactly what I want but it is not cheap (about $290). I am OK with spending that if it works.

Has anyone else set their car up for Bluetooth while keeping the stock radio? If so what did you use and are you happy with it?
I really want to keep the car as original as I can. I understand it will not sound great through the stock speakers but I am not looking to get concert quality, I just can not stand listening to the DJs, and the commercials on regular radio.