Except it's almost impossible to put on (fortunately the ring on my Proteam was torn so I was able to force it on) because it didn't come with a screw ring of its own , this is a good product, protects wooden floors from permanent scratches. The only downside is that the brushes on the front are cut off a bit in the middle as shown in the picture so it sucks in small items that would otherwise just bypass the brushes, but I can see why the cutout needs to be there Like ventilation, it had a smooth head that glided on small molded skids. So now I have to beware of Lego.