Although one could have guessed otherwise, I've always been a happy Subversion user. Which former CVS user hasn't? But now I'm ready to take the next step. For some of my personal stuff I've been using Mercurial for more than a year, so I thought it was time to take the plunge and switch my JSysTest project to Mercurial.
Google Code recently added Mercurial hosting, so I didn't have to switch the hosting provider. The conversion process is quite simple: There are good instructions available that worked without any problems. From what I've seen so far, all functionality I care about is available (basically everything I used Subversion for).
One thing surprised me though: Converting a two dozen revisions took roughly 20 minutes, so for larger repositories you will have to take a long coffee break.