If you played the beta, you'd know that there were no aesthetic bugs.
Occasionally the Cash Shop server would crash, and you wouldn't be able to access Cash Shop. One time, town was unavailable and they had some channel issues. There was some occasional lag spikes on the server that affected everyone.
Other than that, everything was in working order. People were even doing Sea Dragon Nest near the end. This is going to be a great server, and once SEA gets 50 cap, it'll most likely get even better, since the devs of this server keep up with SEA as much as possible.