I'll give you the best tip off the bat, don't stay in a west wing room.
Sure it's newer, has a more modern design, but what they forget to mention is that it's about a mile away from the elevators. Also for a 'modern room', you can't hide a 20" CRT style tv inside a box and trick people into believing it's a flat screen tv. it's like putting lipstick on a pig.
With that aside, the MGM isn't all bad. good restaurants, solid strip location and when they have some specials, it's a pretty solid deal. we had an offer for 129 for sat night and it came with a $100 dining credit at Aria. Overall it's a solid choice and a slight notch above bally's and monte carlo but not quite as nice as the mirage...but it beats the embarrassment of telling your friends you stayed at the imperial palace or the jockey club