I've been to this hotel a couple of times and have been overall very pleased with what it offered.
First off, the hotel (attached via skywalk to various other hotels and a convention center) was a perfect venue for a large convention--which was the purpose of my stay there. The hotel itself was large enough to accomodate the size of the convention, and the presence of nearby hotels, connected through the mentioned sky-tunnels, was great for overflow guests who could feel like they were still a part of the convention atmosphere.
The rooms I've had were nice and accomodating. No complaints in this department.
There is a restaurant in the hotel that serves decent food for high prices. I wouldn't recommend this, personally...
I have had problems with check-in both times I've stayed at the hotel, but I'm sure this could be attributed to the business that the convention weekends brought. Either way, the staff was friendly and helpful in getting everything straightened out.