No time like the present! The platform itself seemed like it worked great, so the question is what did it look like on the other end - were you able to get any companies to actually take on candidates who passed the test? The software's the easy part, it's everything else that's the problem.
The way I remember it, the general experience was that companies reached out to us and were very excited by the idea, but when we actually sent a candidate, they scotched it. I did make exactly one placement where I waived the fee (because friends). They were super happy with him but it was too little, too late.