(If you think you might be interested, be sure to get it now -- the sale probably will only be for a couple more days. I suspect it was just for the holiday weekend!)
I wanted the app so that I could transfer work files -- Word documents for things I am writing, Excel spreadsheets for keeping track of work income, expenses and mileage, etc. -- to my Nook, for times when I don't have my laptop with me or cannot use it for some reason. For instance, it would be really nice to be able to keep track of my work-related mileage right from my Nook, since I always carry it in my purse.
So far, I'm really impressed with the app. Everything looks and feels just like Microsoft software, except on a tablet. It's really easy to download files by linking to Dropbox, Google Docs, or a couple of others (I have only those two). I've already discovered that when working on a file from Google Docs, I can either work on the file and save it right to my online account (so long as I have an Internet connection, of course), or save it to my tablet in order to work on it and save my changes when I don't have a wifi connection. The app also enables me to create a new file if I need to.
Overall, this is a great app, and would have been extremely useful for my work at any price, but I sure am glad I was able to get it for only 99 cents!