I have to say, so far I completely agree with Wayfarer. The PvP is interesting and some of the classes grow on you after several levels, but the graphics are almost distracting they're so regressed. I have a respectable computer but the only thing I can think when playing is "Dang. I'm playing DAOC again, but it's jerky."
There's no reason for the high system requirements given what I'm seeing on the screen.
The class differentiation is fairly shallow. There's a high degree of "everyone kills everyone" and a large number of classes use the combo system a la WoW Rogues in one form or another.
That said, when people are actively participated in public quests, they're a lot of fun. When the RvR queues are short, that's a lot of fun.
The rest of the time, the game is pretty forgettable. Within 10 minutes I stopped reading quests and just mindlessly followed the arrows and red regions on the map, completing them at random.
A good side-game to WoW? Possibly.
The almighty WoW-Killer it was reported to be? Definately not. And I'm not even such a WoW die-hard that I couldn't be persuaded to leave it. But this is just not the game that is going to do it. Not as it sits currently anyway.
I am playing on Reikland for Order and Sapheris (something like that) for Destruction but I'm not bound to either one yet.
Just something to fiddle with.