I tried this place while staying at the Marriott Resort and Casino. I went in about 35 minutes before closing time and they sort of ignored me until I approached someone to seat me. I subsequently felt a bit rushed. They were clearly not thrilled with late diners coming in.
I found the sushi to be adequate but certainly not special. Everything was also priced substantially above what you would find in the area, which wasn't surprising considering a hotel restaurant. The disappointment related to the the completely mundane food and small portions (basically a poor value).
I would not return. If seeking sushi, I would explore the local options away from the hotel.
On the positive side, my server was friendly and accommodating.