Judging by my own experiences, an hour of really hard squeezing is no fun. You will be too sore to enjoy it after first 15min and it's tiring for the girl too. If you want multiple KO's on top of that, you might really regret it.
But you (or she, depending who's really in charge of the session:) can always 're-adjust' as the session progresses. Just keeping you trapped in various scissors while you try to escape can be a lot of fun; and simply pulsating or upping the pressure slowly helps you to last longer too.
You can only take peak of women legs' power in short bursts anyway, so after the initial feel-out
most women dial their squeeze for your particular neck and only slap on the max squeeze when you start to wiggle too much to try to escape
@KO's: some people can take multiple KO's, but most can't.. be careful what you wish for
Let us know how it went! (preferably with pictures:)