Got mine a few hours ago. Here's my short summary on Multiplayer mode (for which some may be interested. It's really ALL the downsides:
So, got the game and went straight to Multiplayer. It's been like 3.5 hours, and I haven't touched anything else.
First off the bat, the controls are really iffy. Don't use default mode. For one thing, if you point your Wiimote to the far right corner, your cursor will start spasming. This means you really won't be making any off-the-wall movements. I haven't actually sat down and played a MoH game before, but the loading time was FAST. Logging in takes 5 seconds. When you join a game, the map loads in 1-3 seconds. You choose your side and press JOIN and bam! You're in the game. Anyway, I'm assuming you can use all the weapons from campaign. It took me a few "test" tries on how to use the grenade, but the scheme on how to use it is nice. The only downside to the controls is if you are in Zoom/Aim mode with a gun, you have to move your Wiimote Cursor all the way left or right to look more. It's also pretty useless to use the command system in big games. It takes a long time, because you press the "1" button. Another downside is your cursor. Your bullets pretty much stay accurate. Meaning, if you hold down the "Fire" button, there is little to no recoil. The shooting is spot on though. It only takes like half a clip (Thompson or MP40) to kill someone. Sometimes like 1 and a half if they run around. It's not that much. It's like America's Army and Counter-Strike put together. That's how long it takes to kill someone. I got comfortable to my customized controls, even though sometimes there are some WTF moments where someone runs in front then passes me and I try to look behind me real fast and my cursor spasms. That brings me to my next thing. First of all, you can run through people. Second of all, and this is a big one,
You can't tell who you're shooting. There are a few ways to tell. First of all, there's like 6 player models from Allies and Axis, and they look all the same. If you see an enemy, your cursor will turn red. Also, if you're on Axis, then your teammates' names are RED. If you're on Allies, your teammates' names are GREEN. This never changes. Hell, it's been 3 hours and I still don't know who I shoot the first minutes of the round. The compass is practicalky useless too. It tells you nothing. It shows like a bunch of red dots but never tells me where enemies are, even in plain sight. The character models are pretty horrible in Spectator mode. They look like they're from an N64 game. When you're playing though, it's an awesome experience. You'll find yourself running around corners and flanking people. It's funny when you rush in a group of 5 people and you start to Meelee them. They all try to shoot you but they also end up hurting their teammates if FF is off. Also, I don't think it shows you a healthbar. Basically, if you start to see blood around your screen, you better kill the person or run.
But yeah, that's my review for the multiplayer. Basically, it's great. You'll get used to the controls and the graphics are SOLID besides Spectator mode. Other than that, it's breathtaking. This is by far the #1 Shooter for the Wii. The gameplay is great for all 3 modes (although I wish there was just a team match. If you die, you respawn in 10 seco ds. In a way it's like RTCW: Enemy Territory for the PC.
I bought it for the Multiplayer mode (although Campaign is a plus). This game really SHINES in small games (like 10). Here, you can pull off your commands unlike big games where people usually spray and pray. I even found a kamikaze (running with live nade) last game. You'll find your share of Pro players too. Anyway, I'm just rambling on. It's addicting. Hell, finishing 4 people in a row with your fist (which looks like a Hitler salute) is hilarious. I recommend it, seriously. Even better, there's Private Games too. CAG Night anyone?
So, if I was to rate this solely on MP, I'd give it an 8.6-8.7
I just typed this all on mty wiimote too. WOW THATS LONG LJLOOllk.
Edit2: So, here's how it is. If you don't spend 5-10 minutes configuring the controls to suit your "style", the game will

ing suck. Plain and Simple.