You'll likely find quite a few FT'ers have flown the Concorde---mainly due to a SPG mileage promo (SPG miles + Bonus-->QF =125,000 QF = BA F/Concorde). I did it twice, both times combining it with regular BA F for the full experience. And yes, the cabin is very tight, with the seats the size of a regular coach class, no movie and limited audio entertainment-- but you did get to see the monitor in the front of the cabin registering speed and how high you're flying. What I found amazing was when flying over Ireland, we were so high you actually saw the whole country 'maplike'. Others talk of seeing the curve of the earth -- whatever, it was an amazing experience and I'm glad I can say I did it.