I recently stayed at this hotel. It is, indeed, fantastically designed. The roof-top bar/lounge area with old oil tanks converted to dipping pools is killer. The rooms are loaded with fantastic, unique and utilitarian details.
Those considering a visit, be forewarned – it's unfortunately not particularly serene or relaxing. The aforementioned roof-top bar is perched directly on top of all the rooms. And downtown Playa del Carmen provides no real escape, either.
Love your blog, by the way. It's become my new daily haunt and inspiration!