There were on display at MACNA for the second year in a row. They are cool, but quite large and already back -ordered, so don't expect to be able to get your hands on one anytime soon. It seems like they have put a lot of effort into R &D, but the company history doesn't inspire much confidence particularly for a $400+ item--- but maybe they got it right.
The smaller model is backordered for us too. The larger one is available. However, as Randy said, they are large and expensive with a track record for a company that leaves a lot to be desired. I'd MUCH sooner spend the same $400 on a VorTech.