First, I recommend not buying this game. It feels very rushed, clearly to come out in conjunction with the DVD. This game might get better only if they get several very comprehensive patches applied to it.
Following opinions formed from 3 hours of multiplayer last night. Fwiw, I've played BF since the first demo came out in summer of 2002, but never played Vietnam. Have played every iteration of UT since Nov. 1999.
The Dark Side:
The gameplay is choppy. Way too choppy. I'm running an AMD 64 3400 with an Nvidia 6800 video card. 1 gig ram. And it gets CHOPPY. Characters are hurtling around, pings are bad on some of them, so you have the choppy "skip-jumps", and then you find yourself run over by a tank.
The "hero units" are just weird. Darth Vader was literally spawn camping. Anything you fire at him gets awkwardly deflected. If he (or Luke if you're Imperial) is close to you, you're dead, nothing you can do. I guess they put them in there to make it more "realistic", like you're running around, and oh shite, it's Vader! But it doesn't work at any level. Just frustrating.
They also have placed random AI units around, just to add more units to the mix. These units are all incredibly dumb, and can be killed with ease.
The WORST thing about it is the interface, particularly the multiplayer interface! You can't even sort by map! The scroll bars literally don't work. You have to click past them to get them to haltingly move. You can't stop the server list from populating, so if you think you are joining a 31 player game with a great ping, it will jump at the last millisecond, and you're in a server in France with 1 guy.
Unimpressive, most unimpressive:
The audio. It's not bad, it's not great. You hear the same laser ricochet sound about every 30 seconds. Footsteps are unusally loud.
The HUD seems subpar. Granted, I didn't go into options yet and try to tweak it. (if that's possible). I never saw my health, or armor. The map view is okay, it's more detailed than BF, but with a map you just need the basics, you aren't going to be analyzing how many stairs there are while shooting people and being shot at.
The battles are large in scope, and feel frantic, in a pretty good way. The tanks, AT-AT's, and other large units can really destroy a team unless you coordinate (which didn't happen last night, granted, first day of playing). Guys who stayed in tanks got 5 times the amount of kills as everyone else. Unlike BF, the tank doesn't start smoking to let you know you're doing damage. After 7 rocket blasts to a tank, I had about given up, when someone opened fire on it with a pistol and it exploded.
The Light Side:
Graphics look good, overall. Running next to an AT-AT on Hoth and looking up is pretty rad. They've added player shadows, which looks cool, but doesn't help anything. The models, water, explosions look nice. You definitely instantly recognize everything from the movies.
Again, these are first impressions. But I stand by what I said earlier, don't buy it for now. I'll definitely play it more to try to get a better feel for it, and I can only hope they release wonderful patches that make this game into something worthwhile.