WATCH OUT!! $1500 DAMAGE TO CAR FROM VALET THAT THEY DENY
In the interest of being balanced, there are some definite pros, while the negatives considerably outweigh the positives and I will never stay here again, here are the good points I experienced:

As Platinum was upgraded to a nice suite in Pike Tower, a bit dated, but spacious, wet bar, bigger than average mini bar type fridge.

Ordered room service (wasn't planning on it, but details under negatives) and had a cheeseburger that was delicious, hot, delivered quickly, and reasonably priced.

The bed was very comfortable.

Location is great, as with many downtown hotels, you are walking distance from almost anywhere you'd want to be, especially Pike Market.

Now, starting with the minor negatives....

Went to the bar Friday night at about 10:40, it was very busy and they seemed overwhelmed for the number of staff on. Was able to order a drink from the bartender almost ten minutes later. Asked to order food, and was told kitchen closes at 10:45. I asked if they could check, could get room service to the bar etc.
Bartender came back over a few minutes later and said he couldn't do anything - interesting as he didn't speak with anyone or pick up a phone. Also, all the printed and other material indicates the kitchen is open until 11 p.m. Which is it? 10:45 or 11?
Was able to just get a room service order in as main room service also ends at 11. From 11 am until 2 am, they just have a few things. It's unusual for a big city hotel like this not to offer 24h room service, but I believe it ends at 2 a.m.

Trying to reach someone...
Called Sunday morning to have car brought up from valet, only no one answered the phone. I tried Guest Services, Parking, Housekeeping, Room Service, Operator for about ten minutes and finally reached the manager on duty.
She was insistent that as they were busy, unable to bring the car around, and to go downstairs and present the ticket. I asked if I could speak to the Manager on duty (this was before I knew I was speaking to her), and she gruffly told me she was. I plead my case to no avail., promptly went downstairs, presented ticket and waited and waited to get car, while many other cars were sitting in the driveway. In fact, to leave, I had to obstacle course, back out the entrance around them.

Since that time, I've been told that they didn't realize I was platinum and would have retrieved my car. If you are going to charge $40 for valet, offer valet services! In the end, they removed the parking charges.

Now, for the finale that earns them a single star...

I drove from Vancouver to Seattle, and upon stopping for gas on the return trip Sunday after checkout, I washed the back window on my SUV and noticed the entire rear spoiler was missing/torn off.

Ford Edge which isn't that high and only a few thousand miles on it.

Valet ticket clearly indicated no damage upon check in.

Thinking back, after I checked in Friday evening, I returned a few minutes later to drive to Seatac from the hotel to pick up my girlfriend. On the drive, we heard a loud noise which I would later learn was the rear trim being ripped from the roof.

Having been to my Ford dealer, spoken with Ford themselves., etc., the only way this could have happened is due to damage to the spoiler from an impact from above or against the spoiler. After supplying photographs, damage estimate, copy of valet ticket etc., to valet company, long story short, they are denying my claim as they could not find evidence they acted negligently.

Parking is run by ACE Parking, and a separate company and the hotel takes no responsibility. However, when they decided to deny my claim several days later, it was the hotel manager who called me to tell me.

So, no more Sheraton Seattle for me, and I will decide what further action to pursue.

Your luck may vary, this is my experience.