As with
About any store vacuum made in the last 20 or so years, Cheap flimsy plastic that breaks easily,noisy rattly performance, powerful yes, good performance, not really, they blow dust ,and don't last, A 50 year old Convertible , while not as powerful, moves more air and will outlast the WindTunnel many times, but then, I have no use for much of anything made after the 70s.