So my fiance and I stayed at the Grand Hyatt Denver on the weekend of December 7th-9th. We had a great time, and really loved the Hyatt.
A couple things: We got a screamin deal from priceline.com for about $80 a night, so we had nothing to complain about getting our money's worth. We came in, the valet was polite and friendly, and even though it was busy, they took care of us quickly and efficiently. We then went to the front desk, and some guy cut in front of us in line. The very nice lady at the front desk noticed, and politely told the gentleman that we were there before him and helped us first, which was nice.
I requested a high floor with a king sized bed. We stayed in room 2119, which has a great view of the Qwest building and other assorted buildings around downtown. We went to the Paramount theater for a concert, which was about a half a block away, which was very convenient.
I would say that for a four star hotel, the Grand Hyatt is a touch on the dated side. If I had paid $200 a night for the room, I would have felt like I got a bit ripped off. But we were very comfortable.
A couple tips, both relating to the valet: It is $26 a night to valet your car there, which to me seemed worth it. Secondly, if you are leaving on Sunday morning, be sure to call down to the Valet before you get down there, as there is quite a line of people waiting for their cars.
All in all we had a great time, the people were extremely friendly, although the guests were mostly mean, which I thought was weird.
At any rate, if you can get a discounted rate, the Hyatt is a great choice!