Let me preface this by saying that it is just my opinion, but I have seen Mystere several times including this past June, have seen O once and saw Ka this past June. I was bored with KA. Performances by the humans did not do anything for me. O was entertaining. Mystere was just as thrilling and entertaining this last time as it was the first time I saw. The human performances were visually stunning, graceful, athletic and mind boggling.I would avoid Mystere and see "O" or KA". Mystere is a simple and a little silly and maybe good for children, but there are better shows to see in Vegas. I didn't see Love, but I am sure that it is better than Mystere. If you call "O" and they tell you they are sold out, call back every morning and every afternoon to see if they have any cancellations. "O" is the best and represents what Vegas has to offer and KA" is amazing. Mystere can be done anywhere. Here is a link for KA"