I use the portable version that does not need a power plug. On the down side, you feed one receipt at a time. I've always wondered if the desk version works like on the commercial.... you put a stack in the tray and it feeds them automatically. I'm skeptical. Maybe someone with the desk model can let us know.
Secondly, the resulting reading of the receipt is not perfect. It comes up on the screen and you have to input the fields that are missing or incorrect... on MOST receipts. It works... but it's not as effortless as the commercial implies.