We had the 2-for-1 coupon, but we still didn't think this was worth it at all.  It's EXTREMELY high up, you can't hear the music that goes with the Belagio fountains, and they let way too many people up there at the same time.  There were people lined up to leave who were freaking out a little.  There were people fighting for the space to take pictures.  I'd recommend you save your money and look at a postcard.