I have stayed at the Pan Pacific a number of times. Whilst it is a 4 star hotel the service is impeccable and the rooms are very comfortable and, to my eye, stylish. I have stayed at a number of supposedly 5 star hotels that could learn much from the Pan Pacific.
Free Wi-Fi and free bottled water are nice touches which make the guests feel like guests rather than cash cows.
My only issue with hotel is the location. It's perfectly located for visiting a certain Seattle based on-line retailer (and I guess 99% of the guests are here for that reason) but it's a long walk to downtown Seattle so, excellent as the hotel is, I would probably chose somewhere else to stay if I was here for the weekend with my family.
Still - this is one of my favourite hotels!