* Initial theme is great
* Undo isn't character based
* Split screen/pane
* Top-right there is a cool preview of the document
* Cmd-R gives you quick access to methods in the current file
* Everything seems very quick & snappy and for the most part looks good especially for a cross-platform app.
On the less positive side:
* The fuzzy finder could be a little more relaxed (typing a few letters then a space will give you no results)
* Find files in project could do with a bit of UI (and I'm not sure it does replace as well)
* The project drawer looks like the sidebar in Finder rather than a proper file/directory view.
Really impressed though - definitely tempted to give it a go...