Overall, NoteTab offers a variety of innovative features that you won't find in many other text editors, most notably the Editor Clipbook tool, the tabbed document interface, and the integrated thesaurus.
When you take into account the price tags associated with the various releases of NoteTab, the client is obviously a great value. While NoteTab doesn't offer everything that an editor like TextPad or UltraEdit does, for many users it offers more than enough features and functionality.
