We were actually there for my child's 9th birthday. She wanted to see a Cirque show - and Mystere was one of the kid friendly ones. I just didn't want to be trekking the strip at night with 2 young kids. Prior to a couple months ago, I had never stayed anywhere in Vegas except the Bellagio - so my expectations ...........
I got the feeling that they are definitely moving away from the "kid friendly" vibe this place used to have.
First - "TI" as they now call it is not part of any of the "groups" in Vegas. So they don't "know" you unless you have stayed there before.
The rooms were ok - smaller than what I am used to, esp for a family of 4 (2 Adults, 2 Kids). Clean... but definitely dated. The beds... OMG - if I could have packaged up the bed and taken it home! The mattress and linens were luxurious!
The pool area was decent... went there mainly for the kids. Just a pool/cabana's.
The resort fee is a bunch-o-crap .. I don't care if it is now the industry norm. You book online and pay for the room, then they hit you up for more money when you get there? Bad business IMO.
TIP -- don't go see the "pirate" show out front with the little ones. Should be considered soft porn.... even for the strip.