Let's talk about feedback. Everyone wants some but are sometimes not happy to get the ulgy thruth.
It is important that as a candidate that you are prepared to hear the feedback from both the employer and recruiter. I can't tell you the number of times that candidates never call me back to get feedback. It makes me think that perhaps they are not really interested in the position. It is also the responsibility of the recruiter to give feedback as well.
I try to give the candidate as much truth as possible. It's important that you know where you went wrong, what needs improvement or where you scored points.
In a perfect world, every employer would give feedback but it's not always the case. Sometimes employers will let us know that there was not a fit and won't elaborate. Of course, we try to get as much information as possible but sometimes it's all we get.
It is also critical that you as a candidate give feedback to the recruiter. We need to know that what we have been told by the employer matches what you've been told in the interview.
Be prepared to hear what the employer and recruiter have to say. Sometimes the truth hurts and that's why employers will use recruitment firms. Keep in mind that it's difficult for most people to give negative feedback. The old adage "this is going to hurt you as much as it's going to hurt me" rings true. So be prepared to give but also to receive. It will make for a better employee/employer match.