In summary? Well worth the visit. A nice surprise. Now some detail: This 800+ stair down (and then 800+ stair back up) adventure gave us much more (in a positive sense) than we had expected (from the reviews we read). We drove there from Tuxtla after visiting the Sima de los Cotorras - a good combination of trips. Driving ourselves always adds an element of adventure and uncertainty (something I guess we enjoy). From the falls themselves, to the path up and down, to the road in, it added up to give us a memorable and most enjoyable experience. The entry fee is very modest and parking is secure and safe. There were maybe half a dozen cars when we were there. One possible issue (in terms of driving) is the one lane road in and out just prior to the falls - with a fairly steep drop on one side. We didn’t run in to any counter flow, but it would have made for some interesting negotiations had we met another car. While the walking path down is good, you need some fairly reasonable level of movement to make the cross-country trek at the end. I think we ended up spending about 2 hours up and down.

We visited this waterfall from San Cristobal de las Casas after touring all the other tourist traps (Palenque, Aguas Azules, etc.). This was a beautiful respite from the crowds and salespeople at all the other sites. You need to descend about 700 steps into the canyon, which I guess is what keeps all the tour operators from promoting the place. If you are willing to do the trek, you will be rewarded with amazing views and the opportunity for splashing about and swimming under a very tall waterfall (aguacero means heavy rainfall). We had a blast, and had the whole site to ourselves for about 30 minutes (people started to arrive after noon). Highly recommend it.