I looked at the Doxie product and was not very impressed. I think they are all marketing hype. After doing lots of research, I bought the Xerox Mobile Scanner (http://www.xeroxscanners.com/en/us/products/XMS/default.asp?PN=XMS). Not only has this product won an Editor's Choice award from PC Magazine (http://www.pcmag.com/article2/0,2817,2399341,00.asp), it comes with a custom Eye-Fi card that lets you scan and save your files to PDF without having to first open them on your computer! Since getting this little scanner, I have scanned all my recipes (the ones laying all over that I have torn out of magazines) to PDF and have my Eye-Fi card instantly upload everything to my Evernote account. Now when I am at the store and need to know what to buy, I just open Evernote on my phone, search for the recipe and have my entire ingredient list. I'm sure this process would work exactly the same for your wife's receipts! Good luck!