we have two of these for clean chalk dust from classroom av equipment . they have a lot of suction and do the job well . at eight pound they be a bit of a load to carry but we need the power to get chalk out of monitor and computer . we try the adapter and paper bag think the chalk dust would go right through the cloth bag . still do not know if it be worth the trouble , the paper bag adapter be hard to find and the paper bag come off inside the vacuum once . we may go back to the cloth bag . all in all we think it clean well and seem solidly make , like it will last .