I typically use MacVim with Janus (I’ve stripped some things out) mainly because of the navigation and the fact that you really don’t ever need to take your hands off the keys. I still find that MacVim is missing things, like completion of functions in a project, or adding extra folders to a project. When I’m working on something that needs these features then I turn to PHPStorm since it can do the above and has pretty decent Vim keybindings. Really I’d love to have something even more robust than PHPStorm and Light Table looks intriguing.
I love how the documentation shows up to the side, and the documentation search. I think it has the potential to make my work easier, now lets hope it gets support for more languages and doesn’t get bogged down like so many other IDE’s.