King harbor Marina is the old style california marina with wooden docks. The docks have been upgraded with fiberwood, making the docks better than the old plywood/planks that covered the docks before. The marina is a friendly, neighborhood like place, with a family-like feeling. There are ample docks carts. During storms there is a bit of a surge as the docks are close to the sea wall that can experience waves over the seawall. The docks are a very short distance to the fuel dock and ocean (only a few minutes). The marina is walking distance to many restaurants and shops at the pier.
Newmark's is the old style california marina with rickety wooden docks. While there is a gate to the docks, it is never closed. This has not been a problem as there are plenty of folks around that keep an eye on things. There are ample dock carts and the shower/head facilities are adequate. One negative aspect to Newmark's is its location: it is next to a scrap steel rendering plant that puts alot of steel dust in the air (resulting in little rust spots on the deck from the moring dew). Newmarks is also 45 minutes from the sea (through Angel's Gate)
Tahitia Marina is the only marina in Marina Del Rey without gates or dock carts. While the dockmaster (Gustavo) makes the boaters feel welcome, his sentiment is not shared by the management. The management does not allow boaters access to the pool or workout facilities. The shower facitlities are second rate and in need of some TLC. The marina is located in basin A and B and is a short distance to the fuel dock and the ocean. We stayed at Tahiti Marina for approx 4 years.