i had 2. con is yes u could possibly have back pain for the rest of ur life. its the worst after giving birth tho due to it being tender still. pro is yeah u dont feel a damn thing lol which os good cuz if u rip or have to have a epistomy u wont feel it. although after the epi wears off u will. depending on how bad u tore or had to be cut depends on the pain after the epi wears off.
I've had two, with my first baby it was perfect. The site was sensitive for about 18 months, but eventually went away. Baby #2 the first epi didn't take, had it redone and it was perfect again. I'd do it again, in a heartbeat.