I have always nursed my babies whenever they wanted it regardless of where I was! My boys are 13 and 11 years, I nursed them both for around a year each, I never ever had any comments.
DD is 4 months old EBF and is fed whenever she wants it regardless of where we are. I was in Morrisons cafe the other day and heard a woman say don't look now but she's breastfeeding, I made a big point of looking at her and smiling (I really wanted to be nasty and challenge her), I think because I was nice to her in made her feel that she had to be nice back lol and she even commented how lovely LO is!
On the other hand was in a little deli/cafe we have in town feeding the other day and an old lady kept smiling, when I got up to pay she commented how lovely it was to see a baby being fed the way a baby should be.
I am very discreet, but only for my own sake not that I believe you have to be, I don't use a nursing cover but just lift my top up enough for DD to latch on. DH says you can never see anything.
xxx