I got mine today and got to play with it for a couple of hours, and I really enjoyed it.
Seeing the T.Rex in Dreamdeck was incredible, pretending to dodge bullets as if I was in Matrix in Unreal Showdown made me laugh, and flying my Asp Explorer on a short trip made me, I can't, just whoa!
Sure it is not perfect, but I'm sold on the experience.
That game slipped under my radar. Just tried it. Looks very promising! I may well buy it once it's a bit more complete .
(I hate it when they put early access games out. I know it can make a studio a bit of money to help them keep going till the game is ready, but it's pretty pointless getting too far into a game as you never know when they're going to change some major and force you to start from scratch)