Summary: I had a canon 8400 and the power supply died. This one was one up newer model. It arrived well packaged and operates exactly as my old one. It has more resolution and functions very well for me. I scan mostly black and white copy, but when I scan a photo the output from it is superb. I am very well satisfied with this item. So far this is the best scanner I have owned of a total of three others, all canons.
Summary: Love the scanner, the optical quality is great. I don't like the bundled software, as it doesn't allow for multiple scanners to be hooked up at the same time. However, using the Canoscan 8600 and the Canoscan 600F scanners with Photoshop CS4 (Mac) works great.
Summary: I bought this scanner because I have a lot of old photos to add to iPhoto. Consumers Report said it was the top of the photo scanner list. They didn't lie. I use an iMac and the resolution on old photos is spectacular. Literally no loss of resolution and no grainy-ness or yellowing you see on cheap scanners. It has easy buttons on the scanner so you don't need to get into the app to scan or copy. Cons- It's a bit large and takes up space on your work station.