It has it's pros and cons. You can select 300 or 600 dpi, and Color or B&W, and you move the roller by hand over the surface of the paper. Color at 600 DPI requires the slowest movement, about 13 seconds, and B&W at 300 is very fast, about 3-5 seconds, though I prefer to move slow and deliberate to get the best scan.

Handheld scanners are never going to be as precise as a stable flat-bed scanner, but they are much smaller and more convenient. I often have to go to a medical record archive and a journal library archive to get copies of records or papers that are not available any other way. The records department has a xerox machine, but it is located one room over and the doc often wants a scan anyway, so it would be double-duty. And the library you have to wait in line to use the copier and input a password. This thing makes my day go that much faster. It stores to a micro SD, so after scanning I usually put the chip into an adapter and put it in the eDGe to see how the scan came out.

The alternative, from what I know, is to bring a full size laptop with a peripheral scanner into the records room every time and power the thing up. Definitely not practical in my case.