Jim, I am interested in this top. I just saw your reply to this thread. I was planning on making plexiglass side curtains/windows anyway.
Getting in/out: Honestly it isn't so much a matter of height as it is flexibility. I came home one night and it was after a rain with the top up. After I hit the remote and pulled into the garage, I un-gracefully plopped out of the car onto the garage floor. My hand slipped when getting out, I usually push/pull myself out with right hand splayed on the rear fender and left hand on the sill. Once your torso is out and butt is on the sill, it's not so bad.
I'd really like to modify the rear window area of this top so it can fit over my headrest/fairing. That would be a very sweet thing.