Libertarian Candidate: Gary Johnson

Anyone know much about Gary Johnson? I know that in 2012 he was a challenger to Ron Paul but the word is that the Libertarian party will have a ballot space in all 50 states this year. I don’t know a lot about him yet, but I do have libertarian leanings and I don’t think either the DNC or GOP have anyone worth voting for in their arsenal right now;^google|twcamp^serp|twgr^author

I think that he did okay as Governor of New Mexico. Anyone had any experience with him?