Justin,
Yes, space can be a bit tight in the Crossfire and some people can't manage to fit. I know some folks here are pretty tall and have managed to adjust the seats and get comfortable. The only way to tell is to get in one and see for yourself.

Compared to the Mini, its a lot tighter though. I have a friend of mine who is 7' tall. He can't even get one butt cheek in the Crossfire, but fits just fine in his Cooper S. Go figure...