SearchChicago have published a review of the 2007 BMW 650i Convertible. 'Inside the design is simple yet complicated. It is simple due to the few controls you have are at easy reach and are easy to use. The layout is minimalist, and most of the 650i’s functions are all conveyed via the do-it-all computer, aka iDrive. This system just takes everything that the car stands for and trashes it. For some reason, the iDrive seems harder to use than other cars with similar types of do-it-all systems and I found myself taking my eyes off the road for much longer than I should trying to change the Sirius satellite radio station. The stereo has an amazing Logic7 sound system with 13 upgraded speakers.'