I did (but admittedly not for long). It didn't have the same level of polish. Has this changed? I can already use TM bundles on Sublime Text, but it just felt more feature complete.
It's more polished now than it was. It's still in its nascent stages, but it's improving on a roughly monthly basis, in a definite excellent direction. The vi approach seems to be at its core, which is notable as new features are being implemented. And it's scriptable in Nu, which is pretty sweet and gives you access to all of Cocoa.
Thanks for the response. Will definitely have a second look, now that I have an idea of what to expect. Competition is definitely good in this space… especially now that the trend includes TextMate bundles & themes so it's not too hard to maintain a similar environment.
I personally find it much more polished than Sublime Text. It's not quite TextMate yet, but close.