I really try to like this game, I really do. But between the horrible AI, UI, and overall game meta, not to mention lackluster developer support over the course of the last year I cannot with good conscience recommend this to anybody. Wait at least until beta to buy this, and only if they significantly alter the meta-game.
As it stands the AI are imbecilic, the gameplay progression borders on unfair or unplayable even at low difficulty, and the game has a daisy chain of progressive bugs and glitches that functionally cripple your base the longer you play. Invisible raiders? Yes. Unhealable citizens? Got that too. Ludicrous pathing? Sure! Lack of transparency in regards to what you're placing into the game? Oh hell yes, have to rely on an oft-incomplete wiki full of speculations.
You would be better off looking to ancient games like Space Colony, or Startopia for a game of this genre that works. (More in the case of Startopia) This is what bugs me the most, since I normally would expect good things from a Double Fine game, if only because I enjoyed Brutal Legend. But it is obvious to me that Double Fine isn't investing many resources in this game, and probably have no intention of doing so either.
My prediction? A halt in development by Fall of 2014 when the dev team gets recalled to work on what is seen as more 'profitable' ventures. But maybe I'm just pessimistic because I've played games like this in the past with far higher levels of development from studios most people have never even heard of. (Okay, it's moving up into fall 2014 when I edited this and still no halt.. I can only hope that alpha 6 is some sort of incredible improvement.. But I won't hold my breath.)
Spacebase DF-9 - 24.99
Startopia - 6.99 (Space Base DF-9 could learn something about meta from this)
Space Colony - Available on GOG for 9.99 (Again, something Spacebase DF-9 could learn about creating at least tolerably realistic social interactions in somewhat of a fun fashion.)