As an independent contractor in an area with no Performance Building Systems, Inc. dealers, I am very satisfied with their structure and the kit itself.  It enabled me to build an earth sheltered home for a client at one-half the cost of a rectangular structure of approximately the same size.  Performance Building Systems, LLC flew someone out from the home office to inspect the kit assembly and they were available by phone for any questions I had during construction.

Ben Brother, Idaho Falls, ID., Contractor