Good and sturdy construction, works quite well although I expected more power but the problem was in the assembly. I am very good at repairs and my hands are capable, but there is a significant flaw in the holes for the 4 screws of the rim and they won't screw in more than two no matter what. I had to use a drill and open all four, and even then I screwed them in with some difficulty. I've been using it continuously for two days and it seems fine, but I don't know over time...