Pro pipes, or 'noob tubes' as they're commonly incorrectly referred as, are actually a lot less cheap than people make them out to be. At least nowadays. You get two shots per life. So, for every death, assuming you even hit your mark, they don't have flak jacket, you've proper aim, etc..you get 1-5 kills. Usually 1-2 at best. The reason people bitch about them is because they're one hit kills. Well, so is a knife, but nobody bitches. Someone quickscopes you but that's okay, right? That's part of the game. Well, so are prop pipes. Here's the cons: 2 shots. Has travel time, thus meaning you can be killed. Takes a second to fire the shot, thus if you're hit, your shot flies into the sky instead of at your target. It's easily stoppable with flak jacket, and the user is dead once the enemy team realizes this. Pros: It's a one shot kill. Hmm..that's..about it. It's a pro weapon to use, because unlike guns, it has physics properties you need to learn. You don't just aim at someone 50 meters across the map, you have to calculate properly where they are and hope they don't move after you fire. Close up, if they're -too- close, you'll fire a dud. They're not overpowered, it's just the hype and the joke that's been running since forever. People don't like to have their killstreaks cut short by something they feel is 'overpowered'. Guns are overpowered, should we stop using those? People wouldn't bitch about the MP40 in WaW, but you 'noob tube' once, and suddenly it's open mic night at the Apollo. It's a game. So you have to change classes, that's good. That breaks the tedium of an already tedious grind that makes up call of duty and the like.

I used the Marathon, Lightweight, Commando, Tactical Knife combo in MW2 because to me it made it like an assassin game in first person where you would run up behind people while avoiding others which was fun for a while.

However, I usually try to not use the cheap builds because most of them use stuff I don't like(like grenade launchers and such.)

Also, World at War's MP40 is a lot more overpowered than Black Ops' FAMAS...