Great locations for parties. Wonderful staffs.
Stayed here multiple times when I go to the clubs near Pioneer Square. Walking distance to the Last Supper, Trinity, etc... The latest stay was St. Patrick's Day 2012. 
The room I got are always spotless and clean. Beds, linen and blankets are always super comfy. After check in, we called down and asked for extra linens for the fold out sofa. Within 10 minutes, it was brought up. Any room services I ever use were fast and all the staffs were very friendly. 
Also, I left my iPad2 at the hotel this last stay. I called after I was already 3 hours away from the hotel and the front desk told me that the housekeeper (whose name I later learn was Josephine) has just turned it in and it was locked away in one of their safety deposit boxes. I told them I couldn't come back to Seattle again until the following Friday, and they agreed to hold it for me until then. When I arrived to pick up my iPad, there was not a scratch on it. I can't even begin to express my appreciation for the integrity shown by the staff here!
Two small concerns: 1) valet usually takes a long time to retrieve the vehicle -- so call at least 15 minutes before departing your room. 2) location is perfect for the pioneer square. It is too far walk if your main interests are shopping, pike place market, or city center (space needle) -- unless you want to pay for taxi or take your car, I don't recommend it.