I spend the last few day buy sander and take they back -lrb- 2 actually -rrb- . one be a porter and cable 3x21 . this seem to be a well build sander except the dust collection system be very flaw . I have more dust fly than go into the bag . then I get the heavy duty DeWalt . this be a heavy brute . I find the top front wheel create a vibration every so often that the sander seem to hop and create tiger stripe on the work . it also require a lot of energy bto hold it down . even tghough the dust collector seem to be one of the best , I find a lot of dust all over the bag . I do not know if the bag fabric 's hole be allow the dust to escape or create static electricity to attract dust . even though the bag collect the dust , it seem the sander blow a whole heap of dust around . when in a tight corner and I tip the front to extend the reach , it seem to bite the work . it seem to go through a lot of sand belt with little to show for it . then I buy this baby . . very light and require very little effort to hold it on the work -lrb- always fight with the DeWalt -rrb- . the way this be design , there seem to be very little dust outside the bag and even then , there be no vent hole to blow it all around . the collection system work great and there be even a little attachment so I can hook up a shop-vap with a small hose . the sand belt seem to last twice as long as the DeWalt -lrb- do not know why this be so -rrb- . the sand seem to be far more efficient than the other sander I try and return . the icing on the cake be a accessory to hold the sander like a table sander .