When I first came to the OneNote team, I had a single laptop at home I was using for my notes. This was the (now old) 2007 version. Things have changed a bit and as I was looking through my notes, I realized I have many different machines I use frequently. This helps test interoperability between the different versions and makes me able to verify my data is available everywhere. Here's where I am:
Oh, I also use the web client now and then if I am on a machine that doesn't have OneNote on it and I need access to my notes.
So the only clients I am missing are really the Android and iPhone/iPad clients. But since I already have a phone and tablet, I can't really see how I can integrate them into my daily cycle. I can test with them whenever needed but it just wouldn't be easy for me to add to the 6 devices I already use.
Questions, comments, complaints and criticisms always welcome,