Alex and the business that owns rooms in the Signature was great and easy to work with.
The place is nice and it's great to stay near things but not go through a casino to get your room.
But the Signature itself has past issues they haven't corrected and some new ones. Waited 20 minutes to check-in (somewhat late at night) while they ran a computer report that should be automated.
The huge thing was getting in, esp. if you will park a car. It's valet only, with nowhere nearby to self-park, and at peak times there aren't enough valet staff. The first morning it took 30 minutes to get my car, 20 mins. the next day, and about 15 the next. The day I left I had to ask them after 15 minutes to rush it so I could catch my flight.
One evening (Valentine's, so staff called out), the line of rideshares and cars pulling in was backed up down Harmon Ave. It took over 20 mins. just to pull in because there weren't enough valet staff to park.
Nice place; MGM needs to fix the operations.