Full release will be released when it's done and not before. :) (I'm paraphrasing.)

As an early access game, it's TOTALLY worth the money to buy. You will get some solid game time for an easy $20. You can play solo, which admittedly can be a tiny bit grindy sometimes, or play with a mate or two (or nine - there's room for 10 of you) and enjoy some company while you play. The game is completely open world, you can do what you like when you like at whatever pace you like. There's obvously difficulty jumps and some steep skill and gear curves but it's still fun.