I have one, I dont recall the model numer though.
Though cheaply made, like everything else, as long as you keep it clean it wont jam up. Mine recently stopped moving and I took it out, took it apart, and gave it a good solid cleaning. You are supposed to take out your powerheads and return pumps and clean the impellers every couple of months anyway. Providing you took it apart carefully the first time - so you can see how it works -it should continue to work just fine with regular cleaning!! Mine does.
I hear people complaining that they stop running but to me, it all boils down to maint. IMO. The Powersweep is run by a pretty simple mechanism so....... heh.... I dont know why they just seem to 'stop'. You have to do something pretty drastic to get that simple mechanism to bust or - just not clean your powerheads.
One thing I do notice that irritates me is that they do not push out the gph that they claim on the boxes. A powersweep is nice if you particularly want to put it over some yellow polyps or green star polyps
(etc) but thats really about it. I'd rather a wave maker