I've done a couple of hours on the A320 sim at Heathrow and I have to say I thoroughly enjoyed it.
Circuits at Heathrow with an engine fire and max dem xwind were especially good fun!
I was there with a friend who is a BA skipper so didn't pay anything like the amount you're talking though.......
You're only young once!
Oh, and by the way, I'd rather pay £195 to UH for 35 mins than pay the BA flying club at Booker £180 for an hour. The contrast in quality of instruction could not be greater.