I have had my nook simple touch for a few weeks now- I previously owned a Sony Reader pocket edition, and I own a iPad. This device fills a niche- if you want to annotate pdf documents or watch movies or any of those other things, get a tablet or the iPad or the kindle fire. This device is designed to read books, and it does a beautiful job at it. I purchased my Sony reader expecting to be able to add comments in it, but it was way too difficult, and ultimately I decided to purchase an iPad. Like the Sony reader, the nook can take notes but wouldn't be a great device to purchase for that purpose.