Joined: 16 Dec 2001
Posts: 2803 | TRs | Pics
See the manufacturer's information at https://grandshelters.com/.
I used it a several times when my kids were little. I found the results depended on the snow conditions, and building an igloo with the tool is still a lot of work (but not as much work as when I cut blocks or packed blocks using a rectangular waste paper basket). I haven't used it in a few years and am trying to clear out my garage.
Message me if you're interested. I live on the East side of Seattle about a mile south of the 520 Bridge (near Madrona).