Originally Posted by InfernoRedXfire
Max, if you are referring to the losing some leg room, no you don't. Believe me, I'm 6'-1" and need the seat all the way back. Here's a shot of how it attaches. As you can see, it is in line with the back wall behind the seat so it does not restrict the seat from going all the way back.
I had to ask! I have a friend (believe it or not) that has that on her Z4, and I think it is the nicest way to go. I'm just too darned cheap...