I stayed here for a conference last month and was pleasantly surprised by how nice it was. The lobby was very attractive, the staff was extremely helpful, and the food (especially Omaha Steak House--some of the best salmon ever, no lie) was awesome.
The negatives. Like all atrium hotels, noise from the lobby can funnel up to the 4th floor very easily. Not a big deal during the day, but it's a different story at night.
While the rooms are tastefully decorated, the mattresses have to go. My room had two queen sized beds and both mattresses had hollowed out pits in the center.
I would stay here again, but I really hope they upgrade the mattresses before then.