Had mine done 18 months ago on the NHS, slash and burn stylie. No real discomfort, no swelling, no purple plums. A few points I would offer as advice:
1)Don't be first in that morning - let some other poor bloke warm up the very cold plastic bench you have to lie on. Otherwise it becomes microsurgery.
2)Shave very thoroughly - everyone will thank you and comment on what a good job you have done. Don't be like my mate who sliced his ball sack open with an electric trimmer, as A&E will wet themselves laughing at you. (Alarmingly, BA trust his hand eye co-ordination enough to let him fly passenger jets!)
3) When they tell you take it easy, they mean it for a reason. Don't be fooled by the hard men on here who ride home from the op via Glentress Black on a rigid single speed. You'll know when you feel right again. Get it wrong and get it infected, you may spend 6 weeks unable to wear anything other than a long baggy T shirt (another mate!)
4) Don't take advantage of your other half's delight in your sacrifice and commitment until you have healed - if you dislodge the scab it can take 3-4 weeks for it finally heals over. Just trust me on this one.
5) Make real sure you don't want another child, especially if you are still relatively young. I was advised to wait until our youngest was a year old as most infant deaths occur within that first 12 months, and you may want another one should that happen. Also, if you were to split with your partner, you may want another child with someone else later, or miss the chance of a relationship because you can't have more. (A very serious point made by MrsSwadey when I'd bought an unapproved bicycle while waiting for the op)