Hi! The servers seem pretty stable and relatively lag free.
As for why people like it...
Honestly, I haven't played it enough to discover all of the intricacies of the game but there seems to be a lot of stuff to do. The graphics are decent and the world is huge. There don't seem to be any game stopping bugs either. Leveling up is pretty easy and there seem to be plenty of quests. You can do stuff like guild battles, town battles and probably more things which I have no clue about haha. There is a type of crafting / upgrade system and plenty of money sinks so you have lots of stuff to work for. I think you can murder people and certain NPCs as well haha... Hope that helps!
What is your IGN by the way KingAssassin? I will add it to the list
