emptyhangar.com?

Has anyone ever heard of emptyhangar.com? I stumbled across the website a week or so ago while browsing for hangar space and was wondering if anyone had any experience with the company. It seems to be a pretty good idea but wondered if anyone has used their service. The company claims to make "efficient use of all hangar space at destination airports across the country." They are connected to the NBAA so it seems pretty legitimate. Any thoughts?