The caves are beautiful and certainly worth seeing. It's a shame that they're very poorly exposed / not enough light in place to see the magnificence of them.
The tour is concentrated on king Arthur and his links to Wales, all is timed and the groups are rushed through to be in certain places on time for the tape / sounds and lights being put on.
The guide who led us through said at the beginning: you can ask any questions but not about king Arthur because I don't have any clue about him.
Certainly, very encouraging ☹️
The attraction is very busy and it's advisable to pre-book. It's also cheaper online. However the website did not work when I tried to book the tickets, so we just went hoping there will be spaces available. Fortunately there were, we just needed to wait 20 minutes for the next tour.
The staff were not very interested or involved. They just took you from A to B and we're rather happy if you did not talk to them.