We incorporated visiting this cave with the Quitinday Hills experience. Compared to many other caves I've seen eg: Jenolan Caves, Sydney and Thien Cung Cave Halong Bay, this particular cave is not all that interesting in my opinion.
A guide comes well recommended. Tells many a good story and helps you understand the history. Little-average fitness levels required (the walk up the hill from the car park area is as much out of breath as you will become).
Avoid the stall for overpriced souvenirs at the caves exit! Ensure you wear shoes with good grip as the rocks surface can become very slippery.
Allocate 45-60 minutes for this 'take it or leave it' attraction.