We came to Cerretas on a Saturday afternoon looking for a fun, inexpensive indoor activity for the kids. I didn't have high hopes for the tour, but wasn't expecting there to be no tours on Saturdays. Tours are apparently only mon-fri at 10 and 1. The website makes it sound like there are self-guided tours available whenever they are open, but it's a video.
The only reason I gave them 3 stars was the employees. They were not only apologetic, but a wealth of knowledge about the local area. I left with a list of a dozen other fun, inexpensive, family friendly activities to try out. We did get some chocolate, so it wasn't a total loss.