Given that no other MMO has been made to such a scale when it comes to quality in graphics, and as far as I know no other MMO uses Crystal Tools, I'd say it works pretty well, personally. It's certainly not perfect, but it's hardly shoddy. For the speed at which things download to your PC, I imagine that is predominantly due to how much they have going back and forth to the server. I understand that if anything, too much data is stored server-side that could be stored client-side. Not sure exactly what, but yeah.