Last week, I took it out, followed the instructions for oiling (which involves trying to get a special oil they include through a pin hole), and started to use it. Again, I found that I could do the work by hand 3 or 4 times as fast, but there was virtually no dust. Being retired, time isn't as valuable as it used to be, so I continued for 20 minutes, when the unit stopped working altogether. The minimal, poorly written instructions gave some guidance for troubleshooting, which proved to be totally ineffective. Since I'm an engineer, I proceeded to disassemble it, and found pretty chintzy construction consisting of primarily plastic parts. After cleaning everything off as well as I could, I did manage to get the fly-wheel sort of contraption which drives the oscillation to spin, but only if I gave it a push to get it started. This, of course, is useless once the mechanism which holds the sandpaper is put back on. I concluded that the company gives a 30 day warranty for a reason. Mine's going in the trash can!

The shop vac part of it has some attractive features, like machine washable filters, but mine trips the GFCI circuit every time I turn it on. Since most codes require GFCI circuits in garages, basements, and shops, it requires using an extension cord to some other part of the house. No way I'd buy this poorly engineered product again.