When I left a former job, I was very candid in my exit interview. My former boss and I discussed things that I didn't like about the job, and he was interested

When I left a former job, I was very candid in my exit interview. My former boss and I discussed things that I didn't like about the job, and he was interested to hear some honest feedback from someone with nothing to lose. It didn't cost me anything and it helped him to get a feel for things that other people didn't like either but weren't comfortable coming out and saying. Maybe if things were sour it would have been different, but in this case I thought it was productive and was glad to help.