We had mixed feelings about our stay here, but in the end, didn't regret it.
They communicated with us through many (12 ) WhatsApp messages, in Spanish. I would have preferred a single email, in English. Maybe then we wouldn't have been surprised by a few things such as: you can't drive up to the bubble. You park in one area and are driven to the bubbles in an ATV. The parking area is a solid 25 mins from Mazamitla which makes going out to eat, hiking to the waterfall, etc. a challenge.
The first day we almost left because the people in the bubble next to us were listening to electronic dance music loudly. We asked management twice to ask them to turn it down. Really destroyed the "nature" vibe. Luckily they checked out the next morning and the second day was peaceful. Bring earplugs anyways because inside, the bubbles are noisy as they're constantly being inflated, like a bouncy-house.
On the plus side, Juan (the host) was super enthusiastic and accommodating. The soaking tub was hot and it was a unique experience. Would recommend, but not for more than one or two nights. You can tell they're trying hard, they just need to decide if they're a "nature" place or a "party" place and communicate in your preferred language, preferably through email. Personally, I don't like being bombarded by texts.
The kitchen is quite limited so recommend bringing food that doesn't need cooking-- sandwiches, yogurt, granola, fruit.
Go for it-- just be clear on what you're getting into!