Reflex got bad reviews mostly due to the fact that it was a port that was released so far after the original. But, of course it's going to be late, when they were busy with their own stuff, and didn't have time to do IW's work for them.
There are some things in WaW that I prefer over MW. The online lobbies are neater (small thing yes, but still), but the bigger thing is balance. I found in MW1 at least, that most of the weapons just suck too much (in comparison to other weapons that were vastly superior). It made for a more enjoyable MP experience. Haven't unlocked enough in MW2 yet to see if this is still the case.







