We very much enjoyed our two nights stay at Alki Haven. The views of Puget Sound and the Olympic Mountains are great. There's also a fun vibe just outside the front door with the waterfront bike and walking paths. We spent a lot of time on the rooftop patio (even when it drizzled for a few minutes!).

There are numerous restaurants and cafes a few minutes walk down the path. We had dinner at Duke's and breakfast at Alki Cafe. Both were very good.
The unit is clean and attractive and modern. The furnishings are good quality and the beds are comfortable. Everything feels "fresh".
A couple of things to be aware of. The main floor (with kitchen and living room) is up a flight of stairs from the front door, the master bedroom is up another flight, and the rooftop patio is up a third flight. If you have difficulties navigating stairs this might not be the unit for you. Also (as is mentioned in the house manual) the reserved parking area is small. We felt more comfortable parking our vehicles on the street in front of the house, where there was plenty of on-street parking. Again, this is mentioned in the house manual.
Alki Ave runs right in front of the unit and can be a bit noisy. We left the windows open during the day but closed them at night and used the AC. The AC works well and is very quiet. I doubt the AC is needed often, but Seattle was pretty warm during our August stay and having AC was much appreciated.