Beeger,
Iv taken a ride with Warbird Adventures. It was an incredible time.
I did the full A/C manuvers thing, We did Several loops, Yo Yo turns, Cuban Eight, and Even the Barnstormer Roll. I was pretty into it. The G Forces are Very cool, and Yes, they take more out of you than folks realise.
Another thing, Did you have to Trim the A/C during a manuvere, I know I never did, Just get a fairly neutral Trim and go.
I was trying to be pretty hardcore, So I flew inverted and with lots of Gs, Its the Negitive Gs that always get me. I am proud to report, I flew Manuvers till I puked! (yes had a bag)
The Funniest Thing is watching my Video from the flight. The entire Time I flew with my hand on the Stick, With my Trigger Finger extended, Just like you might hold your Joystick ready to fire the Guns.
I do agree, this is well worth the money, and recommend the flight to anyone.