Technically speaking, most faucets "work" but you will only end up getting a few cents for an hour's worth of work. Hence I wouldn't advise spending too much time on them.
I used to be a big faucet fan but the rise in value of btc has really hurt them. After all, not a lot of money in giving away money. I've cut back to just using freebitco.in I like the random chance to hit it big and while I would not be surprised to learn that it is rigged so no one hits the top prize it pays in a way that you can put off payment until you have a decent amount of coins so you don't get stuck with hundreds of dust transactions.
Good Luck!
It's not exactly rigged, but your chances of winning the top prize (rolling a 10,000) are very small because the site generates a random floating point number (i.e. with a decimal) between 0 and 10,000 which is then rounded. So your chances of generating a 10,000 is actually 1/20,000, not 1/10,000. Someone ran some tests with the code a while back and managed to roll the top prize after 120,000 tries.