A flatbed scanner is fine for occasional scans and one with an Automatic Document Feeder is good for medium use, when you need to convert photos as well as paper documents. In a busy office, though, where all the archive or OCR needs are for paper or prints, you can't beat a sheet feed scanner for...
Single-pass; duplex scans; J-path compact paper feed; Single-button quick scan
Fiddly feed tray extension; Hard to select resolution in CaptureOnTouch; Separate power supply