Overall we were pleased with Half Moon Bay. We were there for 10 days as we left our boat to go home for a few days. Steve the dock master is very good. Attentive, friendly, always willing to lend a hand. The docks are currently under repair and some are a bit rough, but that's being addressed. The seawall works pretty well except in very strong winds. We experienced 20 knot North Winds, that really rocked the docks.
One note, the advertised 1/2 mile to town, is closer to a mile. However the new Apple Market is very good. Enterprise car rental was great, will pick you up, and gave us a great deal on a car.
The only other comment is that even with staying 10 days, we didn't get a weekly rate, just the discounted AGLCA daily rate. (See Update below!)
A good alternative to NYC rates, and does have good access. (Note that the train station is about 1.5 mile walk or a quick Uber ride. ) We would stay at Half Moon Bay again.
UPDATE: The dockmaster reached out and adjusted the billing to a weekly rate, it was an oversight, and he was very gracious! I am changing the rating to 5 stars due to the excellent customer service!