I visited both Geißenklösterle and Sirgenstein Cave. I went during off season, so the larger and more impressive cave in that section was closed to the public.

But for the other two: 

Really lovely place. At first glance the caves are underwhelming, they basically look like any other small cave that you have seen. However there's something fascinating about being in a place where people were making art 40k years ago. It blew my mind as soon as I entered the caves. 

The walk/run/bike between the caves is also very very beautiful and worth taking your time to connect with it. And the Blaubeuren museum is a must. 

I wouldnt recommend it unless you're very interested in art history, otherwise it is just boring caves.