I'm using darcs for a while now, and I like it. I don't use much advanced features, but it's mostly unvisible, except for not intelligently merging my ramblings files (for which it is not really to blame). But.. It's slow. I'd like to give git a try, but only for deploying the zwizwa website, to see if fast rollback is possible: if it doesn't work, rollback immediately and possibly automatically.