This place is fun! It took us about an hour and a half or so to walk through it. We did the pick 3 for $60 deal that MGM has going on and this was our 2nd pick. It is worth it to do the deal if for no other reason than not having to wait in line to buy tickets. We just went right in.
The place itself is very cool and feels like a jungle in some places which is fun. The best room is the stingray touch pool room. It doesn't cost anything extra and they will let you touch the stingrays for as long as you want to lean over the pool.
Over all this is fun for both kids and adults and I totally recommend it.