I played the shit out of the beta yesterday. I liked it ok, but I didn't really think there was enough beta content for me to make a good judgement on if I should buy it or not. I realize that that isn't really the point of beta testing, but this felt particularly sparse. If the equipment/loadouts are deep and robust, then it'll be fun I'm sure, but that's tough to tell from how much was unavailable for beta.
What I played was fun, though. Nothing revolutionary, but fun. I mostly played the first map where you run around capturing escape pods.