Vasectomies rarely fail, just make sure to follow the instructions and use other contraceptives until you get the tests cleared (since you will still release sperm even afterwards for a while). Hope you have a smooth experience like mine.

I worked with a guy that had to go in three times but I think he was no following post operation care. You are supposed to abstain for a few days while it heals.

When I got my vasectomy it was no needle, no scalpel. They make a small hole then pull the vas deferens out cut and tie it to itself then do the other, all with pain numbing spray. Was 5 minutes not including the ball shaving. I went in to work that night, with an ice pack on my balls all night but barely had any issues. Some extra swelling happened but I went back for an injection of anti inflammatory and it went away.