The way I see it, if you are a hiring manager you are just going to talk to a HR person to screen this people for you actually. The majority of CV's that get to the Hiring Manager get filtered by non-technical HR people. Instead you have a tool that sumarizes the way you interact and think on a 20 min problem solving thingy. Imho I prefer to get a hold of this then having a HR person call me for 15 minutes and talk about my experience and stuff...