8! Wow. Although saying that I do know of someone that's had 11 
Well not really, the 3rd was the worst one I had with the adhesions however for some reason the surgeon decided to go in slightly higher for that one. The surgeon that did the next one said he couldn't understand why they had done that and it was a strange decision to make so possibly just human error there!
It really wasn't as bad as I expected when they said they'd done it though, they fixed the bladder then I had to keep a catheter in for 12 days. They then brought me back to do scans and removed the catheter and I've had no further problems.
I'm not traumatised 
The 4th was difficult but there was no damage done whereas the 5th was possibly the best c section I have ever had.
From what they've told me they do have a tidy up where they can and remove scar tissue, I find it works better for me to not give that too much thought though 
They definitely do scare you with the risks, by the time I had my 5th I was a state! They'd moved me to a bigger hospital with a better intensive care unit (their words not mine!) as they were 99% sure I would be needing it, they postponed the surgery again for an extra day as they didn't have enough units of blood for what I'd need and they gave me an MRI the night before.
I needed no blood transfusion, no intensive care and had the most lovely relaxed c section I think I'd ever had and the best recovery of them all!
Needless to say I won't be having any more. I couldn't even if I wanted to they were very clear on that, but I think I had a strong finish and I'm very grateful for it!