There's not much to say about Puka Shell Beach...it's fairly quiet and the boat ride out is lovely. That being said, you will be EASILY sunburned here (and my husband and I live on a tropical island and apply sunscreen religiously and we were both burned wearing rash guards and hats). The currents were pretty strong when we were here and no one snorkeled out into the water. It might be a fun place to walk up and down (there's a neat Puka Shell sign for photos) but in our opinion, an hour stop was too long and we were ready to get back on the boat.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.