The cave is surprisingly enormous and the wow factor is certainly there when you first walk in. The outside (limited car parking, tiny cafe and basic toilets) simply does not prepare you for what you see after entering. The guide was good and the price is good too so first impressions are great. It gets a bit disappointing when descending the steps as the steps are crude, not well lit and the cave is one single "room" so the value of going down the steps (apart from trying to provide value for the entrance fee) isn't very apparent. The temperature in the cave is a welcome break from the heat outside though and you don't need a jacket.
Also, a cameraman took a photo of everyone entering and he got a bit upset when we were not interested in buying his photo when we were leaving.