My personal experience:

All they do is keep sending e-mails by names like Bob, Scott, Sharon, etc crap, whil ites all ONE person army, Most of the time, they do not even have a real position, they just send e-mails to candidates, and they do same at the other end to clients, working like a Manpower Company, saying, We have so n so workers.

they talk good. but not so in action. Well, most are same in reality. Guys, if you see, Link below may help you for further understanding on how these people work. There is a long list of companies to avoid as well. I will post it again.

http://seeker.dice.com/olc/thread.jspa?threadID=963

Good Luck.