my used cam

It aint bashing and I don't take it personal. This is my first time running a used Cam so I am in new territory. I have built 11 engines of my own but this one was to be a temporary measure while I build the other engine. I have never had a failure of anything I built except my Holley that leaks from the balance tube like my daughter leaks around the eyes when she wants $. So, I am gonna check things out today, there ain't much I can say here except that if there are no signs of damage or any chewed up lobes I'm gonna run it till it stops. I also want to ask, because I have been here for a long time and I hear it sad a lot that this or that WILL fail, how many of you have DONE this? Run a lightly used Cam? With it's original lifters? Out of order? What was your situation, circumstances, and what EXACTLY happened. ? Thanks! I don't mean to be bull headed or set myself up for a hundred lectures on Cam dynamics, you dont know this about me but I studied under Dom Elgin here at De Anza. So I am clear about cams down to the metallurgy. This is why I asked. If this Cam were nitrided and lightly run, ?? Who has tested this and what happened? Oh, and I DO TRUST COMP CAMS.