This game was epic! Worth every cent!
The multiplayer is good, but the one that stands out the most of Horde mode. It really tests your teamwork capabilities. It puts you through waves of 50 Locusts Hordes, each one vastly increases in difficulty. I have to say, Wave 7 started getting tough as it is. Then again, I was only playing with two people.
It is hard to find games though, and lags quite a bit.
All in all, Gears of War 2 is a very great game. It has good replay value, mainly for it's multiplayer, and has a very engaging storyline that will want to keep you playing until you beat it. Although it does have it's flaws, like imperfect matchmaking, or similar single player settings, it is worth a buy.