I see the Rent a coder comment in just about every guru, elance or odesk article I search. All I can say is... I use them all to find service providers and they all have their pros and cons. What I can say from my experience posting jobs on Rent a Coder (now vWorker) is their lack of user interface and user friendliness. Don't let Nicole fool you (I am sure she is a nice person) but the UI for the site suck. It may have all the benefits she cites above but how useful is it if the navigation, UI, email tool... is terrible. I only use rent a coder because one coder I need is on it. For everything else I use elance, guru or odesk. If you don't believe me, compare the UI for Rent a Coder to any of their competitors.