I've been on several Seabourn cruises in the past (this cruise put me over 100 days sailed with them) and while no cruise was perfect Seabourn in the past has been the best - for me. I like re positioning cruises (they tend to have a lot of sea days and I enjoy sea days). I saw one on the Sojourn going from Kobe to Vancouver. Bonus - its a short flight from Vancouver to San Francisco so I'd only have to do the long haul thing in one direction.
Embarkation started almost precisely on time and aside from one passenger using his mass to knock people out of his way to be first was a nice and quick experience. Once on board I noticed that there was no one greeting passengers or directing them to any particular place. On past cruises staff was present to greet guests and direct them.
After embarkation came the muster drill. Thankfully Seabourn doesn't require you to wear or even bring your brightly colored tripping hazard (life vest). The drill took place in the Restaurant and we didn't have to go out on deck and deal with the elements.
I had a GTY cabin (the cruise line picks for you) and ended up in 420. It was very close to the forward elevators and at night the nearby fire/flood doors would sometimes be closed to keep noise down. Noise was never an issue.
The room itself is an ocean view suite so no veranda for me (which is fine as I'd rather be outside on deck).
The only physical issue I noticed was the room had what appeared to be a few dozen shims between the overheard and bulkhead. While not overly attractive (when noticed) they did seem to be doing their job as I didn't hear creaking in my room.
The motion of the ocean didn't bother me in the room (YMMV) and found the room calmer and quieter than some of the more central rooms on the ship. Size wise it was fine for myself but I wouldn't try to put more than two adults in it.