Seen this band twice and they are excellent, they really capture the magic of Queen. If you haven't had the good fortune to see the original Queen, you won't go too far wrong here. The band is led by the bloke who won Stars In Their Eyes (as Freddie) a few years back. They are called The Works featuring Gary Mullen and the web site is link
Yes, I've seen them, too, and felt this experience was just second to the real Queen back in '86.
They played here in a theater (for 3 weeks) with impressive sound and lightshow. I'd definitely prefer their sound to that of the Q+PR tour (you could somehow distinguish what everybody was playing).
Downside: GM doesn't play the piano on stage (and the keyboarder does not have Freddie's skill), and the snare drum sounded odd.
