I got hired through Hired.com, the process allowed me to quickly determine what the industry thinks of my skill sets, transparently see what companies would offer for positions, compare offers and make the right career choice!
The problems with Hired have nothing to do with their business, but more about some of the companies that use it.
When you are a job seeker on Hired, you get the option of setting your desired salary in your online profile. This GREATLY influences what happens next.
Companies will try to get your attention by requesting to interview you for a job that matches your salary ideal. If you make it to the offer stage, those same companies will suddenly try to low ball you, in the same tired, traditional and potentially awkward negotiation phase. The "salary" will often magically transform into a lower base salary + performance bonus that still results in a numerically lower annual salary than the interview request said.