Got this on the 24th. I started playing at around 9pm... didn't stop until 7 am. Yes, it's that good. Already did the first two dungeons... they are both really short (which is good because your not wasting time between boss fights) and have some VERY cool boss fights. The final boss of Polaris is a familiar face that literally had me going "Fuck this. I am NOT fighting THAT."
I'm on Arcadia, but it really doesn't matter where you go unless you like to RP. Their Universe system lets you join teams cross servers, where in you can then temporarily switch to their server to play with them. It's incredibly innovative and I'm surprised no one else thought of it.