Summary: This small, portable scanner outperforms the massive industrial-sized copier/printer/scanner at work. Amazing. I have used it to scan tens of thousands of pages and very rarely has it jammed. In addition to the way the hardware performs, the software included with it really makes it a high-performance scanner. I love that it one-pass scans double-sided documents and skips blank pages. I love that it turns upside down scans, right-side up.
Summary: I've had my DR-2020U over two years now, and it is great... when it works. I constantly get the "Lock" error others are referring to. Of course it is not locked! Nor is there a way to recover from the error except by powering it on and off, opening & closing the cover, opening and closing the software etc. Eventually it works, (except now, in frustration I'm writing this review). When it works, it is GREAT and would earn 5 stars.
Summary: I was very motivated to receive and use for the first time my Canon scanner to reduce my big physical document clutter, but since I received it and struggle to set it up to try and make it work, it has not even given me the chance to scan one single document. I am trying to get support from somebody local at my town, contacted a support service, and they are supposed to come in and check it today. So let's see if it can be solved in any way... I HOPE!
Summary: I had 18 of these to start and 2 years later I have 4 that still work. During warranty 5 were replaced with refurbs and 4 of those 5 broke again. They get an error that says they are "locked" and never recover. Junk junk junk.
Summary: Bought two of these scanners. They worked fine for the first few weeks, but now constantly say that the scanner is locked when it is not. Tried cleaning the screen, removing virus protection, and everything else, but nothing works for more than a scan or two. Canon support is awful. They keep shorter hours for scanner problems than other equipment, and email support clearly has given up on this product. Takes forever to warm up.
Summary: We purchased 4 Canon DR-2020Us for my office over the course of a one year period (from mid-2010 to mid-2011). At first, they worked flawlessly. But after a year of operation, 2 of our 4 scanners ceased to function properly. Then a third one failed after just 8 months of operation, and Canon sent a replacement. So now we have just one of our original Canon DR2020Us that is working as it should (after 9 months of operation) albeit with some auto-feed issues.
Summary: This thing is also overpriced for what it delivers. It should be closer to $299-$399.
Pros: Beautiful scanning quality, both color and monochrome. Software is quirky but does its job. Build quality is solid but mostly plastics.
Cons: Frustrating how paper ALWAYS jams. If I could do it over again, I would have gotten a vertical scanner. This one is lucky to feed properly half the time. Particularly frustrating with any non-standard paper.