Nothing, really. It would be helpful if there was some information about / map of the Parque Natural Montes de Malaga available. I bought the Spanish one fro 8 euros, which was OK (map was fine, and has a multi-language key), but some basic info available free would help.
I loved the seclusion of Humaina, the chance to walk in the Parque Natural from the door, having a cerveza on the terrace at sundown, the very helpful manager, the exceptional value. Some have said food is expensive for what you get. I understand that, but for a small, remote hotel, that can't be getting fresh supplies every day, I think they do well, and I enjoyed my meals very much.