I have the oem cover too. It's great. It covers all the surfaces in the back. The dog can't touch anything but the glass and the headliner.
I leave it in the car all the time. Kind of looks like a rear seat delete and the seatbelts still function. Not that anyone other than my pupper sits in the back anyway. I even bought some fabric velcro and fitted the cover to the sides so it looks clean and professional.
My only gripe -- The front seatback cover doesn't fit the BMW performance seat. Good thing pupper lays down and goes to sleep back there.
