It hurt quite a bit for a week...Major charlie horse like pains in my breasts. Some times it felt like fire was coming out of my nipples for a month. i went from a Small B to a small C and the difference in weight on my breasts made them quite uncomfortable to not wear a bra.
So i purchased a no wire bra to sleep in which helped a lot.
BUT since I became preg with my daughter and my breasts grew a bit they feel quite better now.
It all depends on you and your body.
I know it is a pain to sleep sitting up right for the week. Your breast will change over the next few months when the swelling goes down completely about six months. For between the breasts I would use a small Carona beer bottle it fits perfectly!
As for life after the new additions I had them done in 2000 at the age of 25. I liked the way it proportioned my body my main reason for getting them. I dont wear tight or revealing clothes so most people dont realize I have large breasts unless I wear a tight shirt.
But they sure do look good in sexy clothing that is for sure!