Recently, John Voorhees reviewed Notebooks for iOS on MacStories, and I decided to give it a try.
From about a week of testing it out, I can see it becoming a very helpful and fundamental app to how I study, research, and organise my third year at university. I will be doing a major project, along with some smaller modules, so the flexibility, document structure, and organisation will suit this well.
It's way different to any other text editors, and I probably wont directly do my typing in Notebooks, but it will used for more collating. If you deal with any type of project, then I would suggest giving it a quick look.
I have only downloaded this on my iPad so far, but I'll probably end up getting it on my Mac as well soon.