Been playing this server for a long time, it's honestly PvE at this point. Siege is pretty much dead, people farm gear for no reason at all it seems. The staff is adding new CS at a steady rate, so if you like CS pets it's certainly a server you should take into serious consideration.
Class balance is so-so, Elementors dominate and get way higher ratios than Psykeepers, but other than that I'd say it's quite balanced. But note that they changed the melee formula, so you can't hit people that are "passingby" anymore. You will deal no damage.
I have not much to say to the PvE aspect; you have to put some serious time in to get near to or even perfect gear, unless, of course, you donate hundreds of euros.