I've just recently added it to my collection of editors after using a mix of Emacs, TextMate & a bit of Vim (mainly on servers).  So far I'm liking it quite a bit.  Looking forward to seeing it evolve over time and to perhaps writing my own package functionality in the future.  It's kind of like a modern re-interpretation of Emacs with Python instead of Lisp.  It's also fantastic to have it on Mac, Windows & Linux which was always a downside to TextMate.