Over 8 years ago, I had done this excursion and had been phenomenal. Since then, I always wonder where it was and what company I did it with. Luckily, perusing thru this great website, I found the trek again. I went with Montaña Explora after reading glowing reviews from this site. I highly agree with the previous reviews regarding the professionalism and knowledge of the guides. Ricky and Gama (father and son) are wonderful guides and canyoneering experts. My group consisted of my cousin and nephew (12 years old). Both of them are not conditioned athletes. This trek is physically demanding and takes several hours. I knew both of them were going to have some difficulty, and they did. Well, here comes the intangibles. The guides facilitated and aided them numerous times. At times, gently persuading them to overcome their fear of heights. It went slow, but, they both completed the whole trek (rappelling also) successfully. Another aforementioned quality of this company is their Eco-minded approach. Throughout the trek, they continuously pick-up trash. The canyon does appear cleaner than 8 years ago. Though, there is still plenty of trash that needs to be scooped. Now, like all things in the island, prices have gone up. Eight years ago, the cost was $40. The previous reviews stated $65. When I spoke with Ricky he quoted me $100. This may be due to inflation, or they hiked up the prices to match similar tours done with other companies. I spoke at length with Ricky about the future and direction of the company. The future looks promising, with an emphasis on conservation and safety. A website will be up soon and will have all the details required for the various tours they offer. Do this trek with them, you will not regret it.