We took a taxi from the sea-tac to the ship, there were 4 of us, it was $46.00. Much cheaper than the shuttle at $27 per person.
We arrived at the dock around 11:00 and were on the ship by 11:30. If you can carry your luggage I recommend you do so. We did not receive our luggage until 4:00.
1st day was at sea, we did the noveau steakhouse, which I highly recommend. The only complaint I had is you could hear the entertainment from the bar on the 2nd floor, it sounded like bad Karaoke. Reserve a table along the windows and you won't have that problem.
We had an obstructed view balcony on deck 5. We were overlooking the lifeboat, which only obstructed our looking down not out.