Westin Hotel has a touch of elegant and comfort atmosphere with friendly staff and great customer service.

The 2nights we spend here were very comfortable and the bay park just across the hotel was very enjoyable. It has everything you need and expect in a Hotel; it doesn’t have a microwave which can be a bummer for some but Westin does provide their own restaurant in the hotel. The hotel is location is near several restaurants including the famous In-N-Out bugler joint.

Overall experience was great I would definitely recommend this place.

I felt the place is completely fine and adequate for a night before or after a flight. It does meet the expectations of a Westin or a nicer Marriott property. The room was nicely decorated (fairly recently, it seems), clean, and completely acceptable to my expectations. The shuttle was timely and not overly full. Shuttle also serves the next-door Aloft, but not any other hotels (that's a plus). Note: the shuttle outbound to hotel from airport goes through regular numbered terminals 1-3 first, then International last, then on to the hotel...so it is ideal to get on at the International last stop and head directly to hotel.
They have room service menu. There's an In'N'Out burger about 8-10 minutes walk away, but it's along a busy road and overpass so not the most pedestrian friendly. Also, the walk down to the Marriott is about 5-10 minutes along the bayfront trail which is pleasant, but frankly Marriott does not have a very different foodservice offering from the Westin so the walk is rather useless (although pleasant). You can also go out for a walk along the bayfront trail just to observe the planes landing and taking off, if that's your type of thing.
Overall- yes it meets Westin standards, especially inside the rooms (where it counts). I saw very little to complain about.