I bought it, got 50% off for being a BF3 Premium member so I thought why not.
The SP is just your normal box standard shooter, nothing really special about it but it's not bad, just not anything new.
The MP is good imo, it has quite a few bugs and needs some work on it but it is good if you play it the way it is supposed to be played. It's not like BF3 or CoD, it has similarities with CoD because of the kill streaks but it's a lot more tactical. You can't just run around running and gunning and if you play it like that you are going to get killed a lot. You have to move carefully and use cover a lot, the kill streaks are also designed to be used in a tactical way and not just to kill people.
Another thing is your fireteam buddy, you need to stick close to him because you can heal each other and resupply each other, you also earn bonus ponits for various things whilst near him as well.
All in all i'd give it a 7/10, it's not perfect and needs some patching but if you are looking for something other than BF3 to play MoHW isn't bad.