Britax B-Safe infant carrier installed in center of rear seat. I'm 6' and can still drive comfortably with carrier installed. I pull the seat up a bit if my wife sits beside me next to the baby. I do need to bring the back of my drivers seat full forward to get the seat into the back, and it takes an extra hump with the carrier to get it into the base (first to rest on the seat, then lifting it into the base). You do need to park with a little forethought in parking lots so that you have room to open the access door without getting trapped by the front door. Certainly not as straightforward as a traditional 4-door, but I wasn't about to take on 3-4 more years of payments!
Base installed in center:
Carrier installed, driver seat back forward:
Carrier installed, driver seat in position