I have the Bugaboo Bee and the Maxi Cosi Mico car seat. We have a base in my E92 M3 and another base in our minivan. I use the Mico behind me in the M3- it is fairly large - I am 5'6" and can just squeeze back to my optimal seat settings. Using it behind the driver still allows me to have adequate room for a passenger in the back behind the passenger seat or for a large passenger in the front seat. My wife made a custom seat cover that attaches around the head rest posts and has cutouts for the seat belt - sweet! The Mico works well with the Bee and the combination is very portable/mobile - small, lightweight, and quick to assemble.