op, fwiw it seems that overall, those with negative cs experiences are when they were emergencies.
those that are pre-planned seem, on the whole, positive.
my experience: dd1, nearly 9lb, 58 hrs labour, I'm fine but she's permanently damaged from cerebral palsy - the cord snapped at birth as it turned out to be only a few inches long, which explains why she didn't engage and it all took so long.
So, second time around, I requested a cs for my sanity baby's safety - I was thinking of the circumstances being more controlled. It was an overwhelmingly positive experience as far as I'm concerned and baby too. Obviously, beforehand I was crapping myself but there was no need - If it's control you are looking for, cs is as much control as you can get during the unpredictable childbirth business.
I was turned down at first, but chose to see this as a filter system - i.e. if I wasn't that desperate to have a cs, I would stop asking...so I used broken record technique and eventually got a sympathetic and practical consultant who just signed the forms agreeing to it.
Go for what you feel is right, and good luck op.