There's a huge wiki and lots of online content (including gameplay videos) that show you the essence of the game.
I'd say the price is pretty low if you like the genre, but if you don't like sandbox games (meaning that you need a line of "quests" to enjoy a game) it will probably not be worth it.
And it's still under heavy development, so there is always the risk they will introduce mechanics you won't like at all (for me that happened when I "experienced" in-game taxes: if you don't play often enough they wipe everything you built).
I bought it during the Kickstarter campaign when it was sold as a grind-less MMO, and they definitely changed the approach on that... but who knows what will they create at last?