First, it needs 6 stars for location! You are able to walk right onto the sand, listen to the ocean at night (without it being overwhelming) and people watch from the living room without feeling like those people are in the room with you.
Parking is easy (just move for street sweeping) and both Manhattan Beach pier and Hermosa Pier are walkable (10 minutes and 20 minutes, respectively). So many restaurants and shops that are walkable.
The beds are comfortable and there are plenty of towels, blanks, etc.
For beach access, staying in South Bay, and time with family (or 2 couples), this is a wonderful stay!