It is not the size of the office that would freak me out. It is because it feels like an aquarium. I imagine sitting on that deck in a chair and that does not feel comfortable to me either. I do like looking at it which I believe is the main goal of this project.
Doing something for the sake of art brighten up our world. If everything was done just to be practical the world would be a duller place.
It is hard for me to call something a good design achievement if the scope of issues it resolves is simplistic no matter that they chose to make it complicated to build. Other than looking good, this does not tie the function of the office to the outdoors at a human level living in it in my opinion. Neither the indoor or outdoor space appears to be a place that most people would be comfortable in.