I posted three jobs there, only one (a tiny $10 one) I can say was done satisfactory. My experience was awful all around, but the worst is that they won't allow me to withdraw my funds even though I provided all the things they asked. Searching the web, they apparently do that a lot. And if you don't spend the money, you get charged for dormant fees. Using freelancer.com is just a lose-lose game.
EDIT: And it gets worse. After I wrote the review above they reached me asking for additional information so they could help me. I provided such information and they stop replying. It has been 13 days and no response. So don't trust their response rate stats, they just respond to artificially raise those numbers.