After watching Sacha Chua's interview with Magnar Sveen, I wrote that Sveen had demonstrated some Emacs features that I wanted to try out. One of those was
flx-ido. The flx package was written by Le Wang to bring Sublime Text's fuzzy matching to Emacs. Wang describes it as fuzzy matching with good sorting.
ido package already supports fuzzy matching, of course, so the advantage of
flx-ido is the improved sorting of prospective targets. You can see
flx-ido in action with comparison searches using ido flex in this screencast from Wang. It nicely illustrates the advantages of
flx-ido in a way that writing about it can't.
I've been using the package for about 3 weeks and, after some acclimation, really like it. Initially, I used it like I did ido flex but that gave me suboptimal results. Once I started typing the first character of each word—some-fancy-command → sfc—I got excellent results. If you decide to try it, give yourself a bit of time to get used to it and train yourself to type appropriate abbreviations.
The other thing that I find a huge advantage is ido-vertical-mode. It lists your ido choices vertically instead of the default horizontal method. That makes it much easier to see the choices and pick the correct one. This was one of those things that I was pretty sure I wasn't going to like but I got used to it right away and wouldn't want to go back now. Even if you decide not to try
flx-ido, do yourself a favor and give
ido-vertical-mode at try. I think you'll like it. You can see it in action in the Sveen interview or in an animated gif at its project page.