I went to the Waterman's Centre last night to watch 'The King's Speech'. As much as I enjoyed the film, the whole experience was quite stressful.
Some of the staff are very unhelpful and patronising. I might not be what you would regard as their typical, art loving, middle aged, upper middle class customer but I was still rather put off by the disapproving looks some of the staff and other customers gave me and my partner as we walked in to the theatre with a drink bought from the bar outside the screening room (which is allowed,we asked). I hate to think what would have happened if we started snacking during the film. A woman sitting in front of us tutted and rolled her eyes every time we, or anybody else, coughed, whispered or moved during the film. She nearly had a heart attack when one of the viewers got up to go to the toilet in the middle of the screening :)
So, if you're used to the more relaxed, friendly customer service of Odeon or View, and if you don't want to be afraid to breathe at the risk of being shushed, then I wouldn't recommend it.