I used to own one, but I don't remember what happened to it. One improvement over a Tristar is the automatic cord winder. But it's a drawback too, because the cord is rather short.
I have had an Airstorm for several years. It has a tol Sebo power nozzle. Stormy inner bags and can have a hepa fitted to the exhaust. Made by Schoettler Enterprises.
Those, as Bud says are made by Schoettler Enterprises, which also makes Patriot, another Tristar style design. I read that they used to, or perhaps still do, make models out of resin
used to be president of Interstate , I believe thats right, Ruth Hollander sold these at one point, I remember seeing one at our convention in 96 in St Louis.
Their high pressure in-home sales practices have made a lot of people unhappy with them. The prices people have actually paid for them are all over the place. Lots of buyers regret.