Check this IGN review out 9.5/10
http://www.youtube.com/watch?v=tKNFFxt4wuEGot a chance to play this last night. You know I'm a "homer" on BC2, but I absolutely love this game. The maps were genuinely great. Very well laid out and graphically interesting. They really offer a different way to play this game based on the topography and the options to destroy building walls to create new paths. The vehicles are balanced and provide a nice complement to the maps.
The music is awesome. I never thought this would matter, but it really set the tone for this game to make you feel like you're back in the late 1960's/early 1970's. Great sound has always been apart of the Bad Company franchise and this continues in BC2 Vietnam
They completely redid the weapons. The range of the Medic's M-60 was fixed and same with some of the light machine guns. I know this was a gripe with BC2 as the Uzi seemed to have the same range as some Assault rifles. The way many of these maps are set up, it seems that you have a more confined engagements... not as confined as MW2, but not as spread out as the Sniper favorite maps from earlier in the franchise.
At $15, I felt like the maps were definitely worth it. It feels like a brand new game with great maps and a bunch of new weapons. Matchmaking has been smooth so far.