No, you don't have to be an expert. I'm sure you'd run into some problems if you've never used a computer before. I've been adding links, pics, charts from other books... as long as you know how to "copy and paste", it's a lot faster.
It's also a lot faster to FIND your post it notes. I have my notes arranged by page number, so when I click on my note, the page that it's on opens up too.
Even searching by keyword is great. If you want to search for IL-8, for example, it will extend the search into your notes.
I LOVE making hand notes, which is why I didn't want to switch to electronic. But I wasted soooooo much time flipping through pages looking for items that were listed in multiple places, or looking for one of my "special UWorld notes (I knew it was from UWorld bc it was written on a neon yellow post it)", that I couldn't find." Just wondering if anyone else has tried it...