Unfortunately it is fronted by the Mauna Kea Beach Hotel, with gated access. They have a limited number of public access parking spots available. When those are filled you are out of luck in terms of getting in. The snorkling is better than Hapuna, and if you are lucky you might see a rare HawksBeak Turtle. There are public showers and bathrooms and the Royal Waikoloan hotel is a few hundred yards behind the beach which is convenient if you want to go grab a boat drink from the poolside bar to sip at the beach.
Facilities here are limited to bathrooms, and there's adequate snorkling.
Continuing south my next recommended beach is the public access beach at the newly opened Hualalai Four Seasons, next to the Kona Village. This is a beautiful beach and not many people seem to know about it. It is sheltered and usually quite uncrowded, especially if you are willing to walk down the beach. It's right next to Alii Drive, it's crowded and noisy. Facilities are complete including a snorkel gear rental concession.