The Mirage is one of my favorite places to stay and play. The rooms are still fresh from a renovation, they are modern and tasteful with large flat screen TVs and iPod connection. The wifi is weak in some rooms, carry a cable. Deluxe rooms have tub/shower combos, Tower Deluxe has separate tub and showers. Rooms are relatively quiet, like other places rooms away from the elevators are quieter, rooms near the elevators are more convenient. Views are either of the pool or Strip, looking down into the volcano during the show is fun.
Mirage is a an excellent place to play BJ at $25 and above, during midweek there are playable tables for less. VP and slot play is poor. The pool is excellent, Cravings is near the top for buffets (be sure to use the MRB 241s), Burger Bar is great. I like the atmosphere of Mirage, it is popular with Europeans and less popular with the fanny-pack-stroller-tourist crowd. Location and parking is good.
Mirage is expensive if you pay retail but with your good offer I highly recommend it.