I've had this for three plus years and use it regularly in my insurance practice, home office.

I've never had it overheat to the point where it shut down on its own, even when I've run a lot of paper through it.

The machine will take 4-5 sheets copy paper but prefers 1-2. Really grinds at more than four.

Instructions call for oiling it by putting light machine oil (Office D sells "shredder lubricant",I use 3in1 oil -- good enough for my Singer, good enough for my shredder). Have done that less often than the instructions asked.

Have had a problem with some clogging, bunching up at one end. Tonight it go so badly clogged that it finally stopped. Couldn't reverse or forward it.

I noticed the top had "popped" away from the bottom part of the working part of this machine and that there was a significant amount of paper above the gears. It took the better part of 30 minutes using my Leatherman's needlenose pliers to pull all the paper out. Now it works again.

I think if you use this judiciously, it is worth the price. You want/need high volume, pay for a better machine that's built for that or pay a shredder service.