Great app for adding notes and easy to flip back and forth between them and imbedded references. Editing the notes is challenging. The app seems to put spaces between the notes randomly. It would be great to control that. The highlight feature is great as touching highlighted text moves you to the connected note. Superb! However, that note can only be placed at the beginning or end of a section, not just anywhere in your notes. Also the edit feature is at times blocked by the keyboard on the IPad. You can spit your keyboard I guess or use an add on. Longer notes come up in a one line format for edits. Very impractical. $6.00 is very affordable for this app but to really put the note feature through its paces, it would be nice to have more control and stability.