There is a saying in Spain that says “Never say never ever”. So I can’t say I would never employ a private investigator but I think it is quite probable I would never do it.
I have not had any experiences with them and do not know anybody who has had them. I think that common people do not usually use detective services.
I think it could be interesting but also dangerous, depressing and even sometimes disgusting. I mean despressing because usually it has to do with personal problems: between couples, partners or families which are supposed to get on well. As for disgusting I mean that sometimes they have to witness very violent situations like murder.
Unfortunately I have not had any strange or interesting job.