I purchased this camera for an 85mm build intended mostly for indoor flight. The fisheye effect is really bad in my opinion. The distorted view is less than enjoyable.
This isn't as noticeable when flying outdoors in the open though.

I appreciate the form factor, tho it's odd -- it does fit well in smaller spaces. Runcam makes good cameras, and this really is no exception. Bardwell called it the best HD Zero camera you can get right now. Good enough for me!