Agreed - there is very little space there.
I don't really remember the sensation of spinning/being pinned to your seat - I just remember feeling rather ill, whether it was due to the confined space or the sensation of spinning I'm not sure. I'll be skipping it this time, though, even with the green version. I think the whole appeal was the fact that it was a simulator and made you feel like you were blasting off - without that, it totally loses it's appeal for me.