I stayed for a conference (in the 21st floor Starview room which was very nice and 3 sides glass) Friday then for the weekend at Universal Studios.
The 18th floor is great and for SPG members. The lounge is 9th floor which was pleasant.
The best thing about this hotel is the location. It is a 10 minute walk to the Universal Studios entrance and the vibrant City Walk which is home to many food and drink establishments. I would recommend the Dueling Piano Bar for some great later evening entertainment.
The rooms were clean and airy with ironing board, etc and free wifi for business guests.
I did hear that some guest on lower levels had to wait a long time (10 minutes) for hot water to come through in the early morning but this was not my experience.