I'd heard it wasn't a particularly good show to be in the audience for, as most weeks the shows made up of pre-recorded stuff and you may as well stop indoors and watch that on the telly with a beer.....apparently there's not a great deal happens in the studio.
My mate did this a couple of years ago, he reccond it was a very long day & prety boring also clarkson got the hump if you did not laugh after he had his say[:^)]