This is a great sander, well worth the money to me.  I saved thousands of dollars by not getting a new deck so it was also a bargain. I had a 40 year old Sears 3 X 21 inch belt sander that served me well for years, but it started breaking the sanding belts, and drifting the belts sideways a lot, so it was not useful anymore.  This sander did not break a single belt, and I wore out several of them with no breakage.  The unit is well engineered, and the engineers recognized that the biggest enemy of a sander doing this much work was getting the heat and dust away from the sander as quickly as possible.  It has very serious blower in it.  I didn't even attempt to use that little bag for the deck I was doing, at first I hooked it up to my shop vacuum with an adapter I made.  Then I realized that I didn't even need the vacuum, the sander had such a powerful blower.  So then I just hooked up a vacuum hose going to a 5 gallon bucket, with the hose going through a scrap cloth sheet held on the top of the bucket by the rubber seal that comes with the bucket lid.  That saved unloading the heavy shop vacuum, I just dumped the large amount of sawdust from the bucket periodically.  Do not attempt to use this sander without a means to collect the dust.  This is a serious heavy powerful tool, not for a weak person.  With the motor electrical trigger locked on, it can get you in trouble fast if you are not holding on with good support.  It also would be difficult working on vertical or underneath surfaces being so heavy.  I only did the flat walked on surfaces of my deck, which were the most worn and in need of sanding.  Then I stained it with Home Depot Behr opaque, water clean-up stain.