Signature Suite
The Signature Suite is SWEET. It looks exactly like the pictures on the web. One thing to note about the one that I got is that it's tucked far in the back with only a very partial view of the street and about 80% views of other hotel room windows (and a lot of bird poop).
They did bring a very nice cheese tray and the service was excellent throughout the stay. It seemed that they really had to "pull some strings" to get us this suite, which was apparently outside of the normal Platinum upgrade suites (I used points in mid-December)
One very cool thing is the shower in the Signature Suite: it's about 150 square feet (huge) and has that brand new Kohler shower you see on TV: shower heads angled from above, down the middle, sides, everywhere. Wife loved it. I'm more of a solid stream kind of guy but still thought it was a very nice touch. Also had a large shower seating area.