I know someone who had a V and then 2 children accidentally afterwards (why they didn't prevent after the first oops, I don't know).
I have heard of others too, and that makes me skeptical on relying only on that for prevention. H is against getting it too. We use condoms now and when I finish nursing, I will go back on the pill.
The failure rate of condoms is substantially greater than that of a V. That's like saying I know someone who was in a car accident and didn't get hurt and thy didn't wear a seatbelt so neither will I.
I think waiting until you are both 100% sure is wise. DH did have his done pretty soon after the birth of our 3rd, but we knew that a 4th would not be the best thing for our family. Sometimes I get baby fever, but logically there was no question we were stopping at 3. Also, please stop this nonsense talk of vasectomies not working. my heart can't handle it, lol. Nope. Nope. DH followed up twice.