best and worst early access games so far

I'm really enjoying Mini Metro.

Best: 7 Days to Die. (though it's very much still a work in progress and things get broken here and there, its a great first person crafting/survival game)

Worst: Hrmmm.. let me think on that one... I heard H1Z1 was terrible, mostly due to cheaters.

Its hard to do it better than Kerbal Space Program. I was so impressed with it that its the only one I actually bought as EA.

I don't count anything that is currently in EA, though, because anything could happen before the final release.