The new visitor centre is quite nice. Unfortunately, they were several months behind schedule in opening when I arrived this summer, so I wasn't able explore.
There is a very long video on YouTube showing the whole route. At the end you turn around and retrace the same route. It did not look as scary as Carrick-a-Rede but the cave might be claustrophobic. It was hard to see because it was dark. The pace seemed pretty quick. I would probably be lagging behind taking photos.