And it's fabulous, I switched from Sublime Text 2 last week and have no interest in Sublime Text 3 anymore. I was disturbed that Sublime Text 2 had several irritating bugs that I encountered most days and yet all dev was going into the next version that would require a new license. Also I am a sucker for OS X native feel and ST2 clearly had effort put in there, but still fell short.
I use TM2 regularly and really like it for these reasons. My only real gripe, and why I might switch to ST3 at some point, is auto complete. TM technically has code completion[1], but I've never found it particularly useful compared to the popup style that ST and XCode use.
I keep trying the alpha every now and again but there's some little annoyances that to me make it a step backwards in usability from TextMate 1, let alone Sublime Text. e.g.
* Double clicking a directory will make that directory the top level directory in the project side bar.
* Having to double-click to open a file; you can single click but only if you click the small file icon instead.
* Silly fading animation whenever you open a file.
I know most of the time I use the file search anyways but those first impressions really put me off using it.
For me it was the switch from ATSUI to CoreText for the code view rendering. It completely changed the way the text was antialiased, and removed the faux styling for fonts that lacked variants. As someone who liked Monoco, this killed it for me.
At the time TM2 was still private beta and not yet open sourced. I figured if I was gonna change to a CoreText editor, ST2 had the better support.