To me, Mystère seems to be your classic "old school" Cirque du Soleil show. Of the Cirque shows I've seen so far, this one resembles a circus the most. The costume and stage design are a little dated, but this in no way takes anything away from the spectacle. Mystère is simply a lot of fun. The stunts are breathtaking and the comedic interludes are hilarious.
A note on seating: We were in section 101 row E, which is on the left side when facing the stage. While it is true that you have to look up for many of the performances, we thoroughly enjoyed our seats. The segment with the performers on bungee cords was especially thrilling because it seemed like the guy was headed straight for us! Also, one of the bird-like performers walked through our row.