So far only played the two naval battles. Got my ass handed to me on the proper one. Managed to sink maybe two enemy ships. It'll take some getting used to I reckon. It's hard to keep track of all your ships at once.
Just about to try out the land battles now. Running with everything maxed, 4xAA, 8xAF but with SSAO and DOF turned off. They really fubarred how they did DoF, it's really obvious how bad it is in the naval screenshots. Close up objects get blurred into the far away objects instead of standing clear in front of them. Just take a look at the rigging on the ships, it's also massively overdone when you cant see the enemy ships.
EDIT:
Land battle was okay, didn't seem as polished as M2:TW. Lots of friendly fire incidents that I assumed they'd have guarded against, I hardly expected my reserve troops to start firing volleys into my front line just because they saw an enemy. The whole artillery limbering unlimbering thing seemed a little odd too, managed to lose two guns by them blowing themselves up somehow in the process.
And don't get me started on the amount of bugs I've seen so far, one or two is fair enough but every time I start a new battle I get a flickering UI, I have to then reset one of the graphical options for it to reload the battle and then it will work, very odd. When I started the land battle for the first time just after the first part of this post there wasn't any UI at all and I had to kill the game process in order to get out. Second time around and I had the flickering UI problem. I also had a problem when I zoomed in close enough to see the individual grass models. They were wildly distorted being stretched right across the screen. So long as I stayed zoomed far enough out this wasn't an issue though.
Overall impression of the GUI and general implementation was just one of not quite there, not quite up to the standard I expect from a TW game. Handy shortcuts like Shift+1 for line formation didn't seem to work anymore, they also won't go into line formation until you unpause the game so no more getting your battle lines set up at the start of a battle while it's paused.
I think this is definitely one that can be left a few months until these things are patched. Some of the bugs really shouldn't have gotten through the QA process. It's not like a have a non-standard rig, Intel processor, Ati 2900xt, windows XP.
So far I'm not wowed by the game, I'd give it 6.5/10 tbh. My advice, unless you have money to blow or have been desperately looking forward to it is to wait a few months until the first big patches arrive that way you won't be dissappointed because I know this will be a great game, it's just not there yet.