The avery software works great, but if you download the program, it includes other junk that you may not want on your computer. You'll do well to read what you're getting into when you go through the download process. I did, and then quit.
But I do use their Design and Print Online.
http://www.avery.com/avery/en_...
It's the same thing, without the convenience of having the program directly on your computer, but without the other junk that has nothing to do with printing labels.
