It replaced Notepad++ for me, because of the better RegEx Search & Replace Function. Notepad++ RegEx is based on Scintilla Regex implementation which is limited (for example, it supports no $1...9 in the replacement string). The other big plus is the Cygwin integration. If you are familiar with one scripting language (Perl, Ruby, Python...) you can do everything with "e" - this is the thing which makes me love this tool. If you are just looking for a "ready to use" Texteditor, I would stay with the more mature tools like Notepad++ because "e" lacks a lot of features right now...