I'm a Photographer and though I've had one or two replies and one booking, I wouldn't at all recommend. If not for the very fact that the system is an absolute RIP OFF. Their 'credit' system has been replaced for simple currency now, and - although I'd taken the time to do the math in the past anyway - it now seems that a basic bid to a potential client will cost you £15!
Totally not worth the risk, as most bids go completely stale. I'll stick with word of mouth, thanks.