I actually pre-ordered it and have been playing it a good bit since then. I really enjoy it, though its true that it's really a multiplayer game. You can do co-op with the missions and challenge modes as well as battles with other players. It's a lot like Frozen Synape and Hero Academy in that regard. It's asynchronous and you can set the turn times up to 7 days, so really as long as you've got a few friends who are into it, you'll get a lot of mileage out of it.
Also, as far as bugs go, the only one I've seen so far is the ship parts list sometimes won't display the first entry in each list until you click the scroll arrow. Certainly no game breaking bugs or unplayable issues other than the servers being slow for online play.