I actually bought one... and I am returning it immediately. If you haven't already been tempted by what appears to be a bargain... DON'T. Although they are not 'plasticky', they are cheaply slung together and the standard of machining has to be seen to be believed! Mine arrived today. As I was assembling it, I was concerned that the faceplate showed irregular machining on the edge with some areas left as cast where the tool hadn't toched it. Never a good sign. As soon as I switched it on, I realised that I had bought a heap of junk. It was clanky and rattly and it was clear that I wouldn't get much use out of it before parts began to work loose. The reason for the irregular machining on the faceplate soon became clear. It was WAY off true with a pronounced wobble.It wobbled far more than the home-made disc sander I had bought it to replace (which comprises a plywood faceplate fixed to an aluminium collar and attached to an old Hegner motor).
Trust me, this thing isn't a bargain... it's just an expensive way of making sandpaper dizzy.
