I just stayed at the Sheraton Seattle for 3 nights this past weekend of PAX.
Over all an okay experience. Staff was friendly enough, they even seemed to know what that gold/plat checkin line is for as I walked right up to it and got checked in while a long line was forming in the lobby behind me, I'm sure I didn't look (or smell) very gold status as I rode my motorcycle 6 hours that day to get there...
Place was busy, location is great we walked down to the market every morning for coffee and breakfast, location next to the convention center was great.
Room was large, but you could hear the room next door pretty clear. Only got charged for parking 1 of the 3 nights, at a rate of $15 for self parking a motorcycle, it should have been for all 3 nights but who knows...
Only complaint was on my last night, I wanted to be up early to do the 13 hour ride home early, little kid in the room next to mine kept slamming the dresser drawers laughing away, after 30min I called the front desk they said they;d talk to them, 30 min later I called again, 30 min again I called again, noise stoped starting going to sleep and have the phone ring with the security guy calling as he can't hear any noise

their solution to a noise problem is just to ignore it till the 3rd call then send someone up, where I assumed they addressed it the 2nd or 3rd time, turns out they never addressed it at all and it went away by itself. Why in hell would someone call a guest about 2 hours after their first complain about not being able to get to sleep...
Its ok I called the offending room at 430 in the morning just so I could hear the phone through the wall, if I was to go to sleep on their kids play schedule they can get up on mine...
I'll be staying there again next year.