Mark R.
Google
We did the full tour, from Madonna to Crystal Chamber. Piet was our friendly and knowledgeable guide. My son and I were the only two guests on the first section, so Piet was comfortable chatting and also sharing some personal titbits. Other guests joined us for the middle section only.
The sights are fascinating. The experience is less commercialised and popularised than Sudwala. One feels very close to nature. If you're OK with a short crouch and squeeze, the Crystal Chamber is totally worth it.