I am a home woodworker (although an avid one). When the electric version of the random orbital sander made it's appearance, I just had to have one. Watching Norm Abram use his (back in the mid 80's) convinced me that I needed one of those. At that time I bought a little 4 1/2" Ryobi which I used since those days and which has served me well. It still works, but it's quite ratty-looking, so I went ahead and bought this Porter Cable unit. Suffice it to say that random orbital technology has improved since the days when I bought the Ryobi. This unit is a no-frills orbital, and it works fine. There is little to complain about, and little to brag about. Just select the grade of sandpaper, stick it on the velcro, hit the switch and go to down. The positives are that my sander has not failed to perform, and the velcro grips the disks quite securely (something that was beginning to wear out on my old Ryobi). The negatives (and I don't mean that these are major problems)...the dust collection "retainer" box is flimsy, poorly attached, and fills up quickly. I don't really see a purpose for this, except that it gives the illusion that you won't have "fine sawdust problems" with this sander. I bumped mine against a faceframe while sanding a shelf, and the whole dust-box assembly popped off and fell on the floor spilling it's contents on the carpet. Just as well...it was packed full anyway and obviously wasn't functioning to collect sawdust at that point. I didn't even bother putting it back on. Second "con" that I have is that this unit would benefit from some kind of braking system (even if it were a manual brake). When you turn the power off, the thing continues to whirrrr and orbit for a bit before you can set it down. Unless of course you plop it down while in motion, but even then you'd better hold onto it so that it doesn't "walk" off your workbench. I know, I know...you shouldn't pick it up off the workpiece until it has stopped motion...but who really does that? My experience has been that the random orbital sander will be prone to scratching up your workpiece as it slows and finally comes to a stop. A little brake of some kind would be a great addition to this unit. Otherwise...I think this is a fine little unit and accomplishes what I need it to do at a "homeshop" hobby level. Journeyman woodworkers and professional-grade furnituremakers would never use such a tool, but for us homepun-guys, it's absolutely adequate.