I have several 150+ year old hand-written record books that I have been wanting to scan. Flatbed scanners and document feeders would damage or destroy them. This little scanner works great. The scanner doesn't go end-to-end (there's about a 1" margin on each end) and my books are big, so a little ingenuity and image combining was needed, but the image is very good, as good as my flatbed. It handles 8.5" documents fine with no editing necessary, but I'd recommend using a straightedge to guide it; the scan area is JUST 8.5". It's small and light enough to fit easily in my computer bag so it's great for travel.
The scanner does not send images directly to a computer so it doesn't need a connection when you scan. Images are stored on a micro SD card and must be downloaded, either by USB (cable provided) or by removing the SD card and reading it directly on the computer. The scanner does not come with a micro SD card, so don't forget to get one when you buy it. I also recommend rechargeable AA batteries (2) if you're doing a lot of scanning.