Discomfort?? I dont' know about anyone else, but I have to tell you that personally it was one of the most fulfilling experiences of my life. And I am one of the people who thought ICK, Ew, not me!
As for discomfort, from a strictly physical point of view, the release of the milk was SO the opposite of discomfort!! The discomfort was if you were out or something without the baby and couldn't feed, you get overfull and ouch!
The Womanly Art of Breastfeeding is definitely an amazing book, the nurses usually are very helpful with hands on stuff, so my opinion would be not to pay for classes but it's a personal decision. Good luck!
Mom to Kyle, 12
EDD March 15
****sticky baby dust wishes****