At this point in my life I have no desire to be right in the middle of the party - but still want to get to the party if so inclined. I also like an upscale, clean environment. The Signature delivers that. It has it's own private gated entrance, no nightclubs or casino, but allows one to get there via a covered air-conditioned walkway to the MGM Grand, or a quick walk to the strip. If you want to cab it the line is virtually non-existent.
The rooms are large, well appointed and many have great views of the strip. The pool is clean and even when full, doesn't feel overcrowded. There's a Starbucks and other cafes/restaurants on site.
The staff was very helpful and pleasant to deal with.
There's no casino on the property, and there aren't a bunch of drunks or barely clothed people running down the halls at 4am yelling/smoking/passing out/trying to get into the wrong room.
Would definitely stay here again.