My wife and I are locals, and the Westin was our choice for a downtown staycation. We also got an excellent deal, which made this very nice hotel an even better choice.
Location - The Westin's location is excellent. Though not on the literal doorstep of most downtown Long Beach entertainment and dining, the Westin is only two blocks west of the Pine Ave district and the convention center, a block and a half from the awesome Promenade district, and a couple of blocks away from the Pike district. If you happen to be going to the Long Beach Performing Arts Center, the Westin is directly across the street. So, if you don't mind walking a block or two, the location is awesome. The fact that the nightlife is a short distance away probably tends to make the prices a little better as well.
Rooms - We got a basic room, and we were impressed by how spacious, comfortable, and clean they were. First off, they appeared to have been recently renovated. The furnishings were very nice, the bed was comfortable, and the floorplan was incredibly roomy. This was probably one of the largest basic rooms we've ever stayed in. The wall of windows was also a very nice touch. There are great views in every direction.
We didn't use any of the facilities like the restaurant, the pool, or the workout room, but from what we saw, they appeared to be pretty decent hotel standards.