Eh.
Crash - 6/10. This map is a camper haven. It sucked in COD4, it sucks in MW2. It's not a good map.
Overgrown - 8/10. A good sniper map. ACRs and MG4s dominate everything else, though, which is kind of a letdown for a SMG person like me.
Bailout - 4/10. Absolutely horrid. It's a collection of small rooms with a courtyard in the middle of the map. If you don't have SitRep, you're going to die within five seconds.
Salvage - 9/10. Fun map, nothing really wrong with it.
Storm - 10/10. Best map in the stimulus package, and one of MW2's best. I absolutely love it. It's a good size - big enough to actually get into long range firefights, but small enough that SMG's aren't completely useless.