MacHg / Murky / TortoiseHg - which to use?

I started using Mercurial and chose MacHg as my GUI of choice, simply because it was the first thing I found when I googled Mercurial Mac GUI. However, I just recently discovered Murky, and TortoiseHg was recently updated for the Mac. Are there any significant reasons I should choose one over the other, or is the decision simply which application's interface I like the best?