I stayed here with a friend last year, nice vistas up and down the valley from just outside the cave where we chose to eat our dinner as the sun went down. We saw a few people camping nearby but nobody else came in to stay, good job as there's only really room for 2 to sleep comfortably/safely.
Sadly the cave has suffered from abuse over the years, cheap abandoned sleeping bags, the original door and handle mechanism is just scrap metal now, I wouldn't want to risk the "fireplace" and the grass outside was scarred in a few places from people pretending they are Bear Grylls and wanting a fire. There's also the usual graffiti in a few places, inluding the signature of at least one "adventure youtuber" that I recognise.
Anyone going to look for it I'd recommend taking a tent in case you don't find it/it's already occupied/you don't fancy it. The whole valley is a lovely spot anyway.