I wish I'd had one. My DD was huge, 17 days late (nobody would listen to my dates, they went off scans which showed her at 7lb) and 10lb 10oz, I was induced and also had an epidural, emergency ventouse and shoulder dystocia. Post-birth issues include very weak bladder control/ low sex drive / PND, trouble bonding (IMHO anyhow)
I was absolutely PETRIFIED, with sleepless nights, worrying all the time that the same horrendous birth would happen again with DS, so my MW arranged an appt for me to see the Consultant. The Hospital sent this stupid cow of a registrar, and said I had nothing to worry about, baby was normal size for dates.
Guess what, he was almost 10lb and was born by elective CS the day before he was due. He also measured about 7lb.
DH and I DEMANDED for this stupid cow to get the Consultant in, because I was in such a worried, petrified state, I dropped a cup of water and she didn't offer to help clean up or anything, just looked down her nose at me.
Gawd I get worked up just typing this!! So in answer to the OP I have never gone for a post bith de-brief, I only found out about it after I had DS. Wish I had but not sure it's worth it now??