Welcome to FlyerTalk! There are many threads regarding this property and can be found through the master thread. I stay at this property on average, twice a month and happen to think it's one of the better properties in downtown Seattle. The Westin isn't on the "fringe" of the downtown corridor btw - it's about 3 blocks away from where the Sheraton is.
Parking is $35 per night and $30 across the street at the Athletic Club. The pool is still being renovated; they have said they expect the renovations to be finished in the October timeframe but as others have said they give passes to the athletic club down the street.