I've been eyeing this game for some time now. It's a paid early-access game at the moment, still in Alpha. However, when it is finally released, it will be a free-to-play. So the question you have to ask: Do you want to pay $20-30 to try a game that's still buggy and may have numerous issues (but you're helping the devs identify to fix), or wait however long it may take for a final release?