I take it you folks could get on as there would be a ton biatching on here by now! Take a break and tell us poor peasants who didn't get the early access what's it like!
It's cool. TBH there isn't anything REALLY special about it but there are these epic battles which occur in areas with lots of people randomly (called events, you may have read up about them) where you have to perform a task like escourt a character somewhere, destroy a village, grab some creature's eggs, etc. These events really play on the players' ability to act as a team and defeat the opponents. Some events literally cannot be done without a whole bunch of players doing it.
Of course I don't actually know what GW1 was like having never played it but certainly enjoying GW2!