I was in Seattle for a week for work and found it to be a very walkable city - from my apartment in Newmark Tower I was able to walk to every where I needed to go - the convention centre, fabulous restaurants and bars, a yoga studio, great coffee houses, shops and supermarket. I highly recommend Seattle Coffee Worx around the corner in Pike Street if you want a great coffee to start you on your journey.
The apartment is clean, light, well set up and QUIET (not a given in the city!). There was enough of a view of the water to remind me where I was and a buzz out on the street as soon as I walked out the door.
Unfortunately, I did not have time to use all the facilities of the building but I found the concierge staff to be wonderfully friendly and helpful. The staff at Sea to Sky were responsive and great to deal with.