Mel is the single best host I've ever had. He made us delicious breakfasts every day, talked to us about pros and cons of all the things we wanted to do, and took excellent care of us in so many ways. I cannot recommend him highly enough. There is no AC, but there definitely is enough breeze to keep you cool. Humidity can vary, but it's generally tolerable due to the location. The bed is slightly soft, so if that's your thing, so much the better!
Seriously, get yourself to stay here. You won't regret it.