I generally enjoy it although the selection of contestants aired is usually a mix of disabled children, children, elderly people and dogs.
What gets me irritated is the judging selection between the four of them. One will go straight away for the obvious best act. The second will dither and eventually go for the opposite. The third will always choose the act which makes Simon have the casting vote. Simon will then always put it to the public vote. Get rid of this farcical element of the show and go straight to the public vote and save the likes of me much, much anguish.