I don't know anything about it form experience... except to say that it looks very simple, robust... it has a clever/unique system (I think it's unique) of variable pitch on the outer halves of the blades. It's Elliott Bayly's recent project.. he has been involved with small wind power for a long time. I think he founded 'world power' (or something like that) that SW windpower wound up buying out years ago.
We met him and got to look at the machine last year at the small wind conference in Wisconsin just before the MREA fair. Really nice fellow... very nice looking wind turbine I thought.