Well, I've had it for five days or so and I've had time to form a decent impression of it I think.
In short, it's fun and has potential but is fuckin' buggy and unpolished as hell.
I like the pvp system, the queue-anywhere mechanics, and the fact that you gain reg. exp in pvp. Combat is pretty fun, a nice blend of tactics and timing, though I need to get to a higher level before I can really compare it to WOW, as I'm way used to level 70 WoW combat, which is obviously much more complicated.
I'm rank 15 now with my PVP rank around 11 or so. One thing I'm unclear on is how pvp gear progression works- there were PVP gear vendors around in the T1 areas, and I haven't seen any at all in the T2 areas. PVP ability trainers are pretty rare as well.
The graphics are pretty tight, except I'm having some problems making them run perfectly on my ATI video card- without anti-aliasing edges are pixellated, but with AA on I get weird transparency issues.
The in-game text is unpolished as hell; I've seen plenty of typos, and yesterday I saw some orcs that yelled what looked like a pointer address over and over. Not that big of a deal, just funny and a bit distracting.
Of course, the biggest bug I have is that I can't play a greenskin character. I've created and logged in as both chaos and dark elf toons, but whenever I try to log in on a greenskin toon, WAR crashes to the desktop. That's kind of a big deal.
So, yeah. Fun so far and I have high hopes, but they better keep patching the hell out of it.