Just got back from St. Thomas (11/`21) and we had a great time.  I'm an avid snorkel fan with intermediate experience.   Lindquist was the most pristine white sandy beach with beautiful turquoise waters of the 5 beaches we visited (Sapphire, Coki, Magens Bay, Secret Harbor being the other 4).  The beach was somewhat narrow, with outlining Mangrove trees to duck under for some shade.   Unfortunately, the snorkeling wasn't great. The middle is mostly turtle grass while. Both the right and left sides have some corals, but they are mostly dying.  Not a lot of life or fish at either of these.  I would love to have explored a little more, but I didn't see much there.   Oh...they do also have a very nice large bathroom areas with separate showers.   No food/drinks but they do have some picnic tables available.