I personally do not like FPSs. I don't have anything against them I just have never been particularly fond of them.
COD: Black ops for the Wii is actually pretty good. The controls lack a little bit sometimes and are hard to navigate at first. You do however have the option to edit them and pretty much tune them to your liking in most every aspect. The aiming may sometimes urinate you off as it did me.
That and a little of the story in single player being a little crude. There is nothing else I can say negatively about this game. After getting used to the controls I was able to get into the levels and lose track of hours and reality. Which in my opinion is what a good game should be able to do to you. I gave it a 6 due to it being a FPS and needing a little tweaking on the controls.
If you only have the Wii and want a good FPS I'd suggest you rent or even buy this game. If you have a Xbox360 or PS3. Get it for those systems instead. This lacks a bit compared to those versions. Though not a stripped down as I thought it would be.