I bought this belt sander to help strip the barn board floors in our 1870 farm house.  The unit worked very well to strip 85% the lacquer that would other wise instantly plug up may dewalt pad sander.  I have used roughly 20 of the 40 grit belts so far and only had to adjust the tracking only three times during heavy use.  As far as the bag unit provided I have not tried it as my wife had bought a small shop vac years ago that had the right size hose to attach to the exhaust port for instant dust removal. I did have the dust collection unit plug up once but I did use a large shop vac to blow air backwards through the sander and it cleaned out the plug instantly.  Overall I'm very pleased I bought this sander.