Mobile check in is the way to go, the regular check in line on a Wednesday at 3pm was easily a 30 minute wait. We got checked in under 5 minutes only because the card issuing machine wasn't working.
Room quality is....okay. We got a standard double queen room. You can clearly see all the areas in the rooms that have been remodeled. Ceiling plaster shows where the old walls were. Paint is chipping, bathroom fixtures have been reseated so many times the caulking looks like lasagna and the surrounding tiles cracked. Shower is big though! Furniture is very very visibly used/scratched/dented. The air conditioning is weak but cools the room after a few hours.
I don't know about this place. It doesn't feel like a Vegas experience once you get into the rooms. Having stayed at MGM last year I was surprised to see how far the quality slips just going next door :(