I used them due do inverted nipples with DS1. He was 9lb 2oz at birth. Used them for 4 months.
EgyptianPrincess - I used to try without occasionally (once a week at most when relaxed) just to see if he could do it. After 4 months, DS1 just randomly got the hang of it. I think I must have picked a good time and also he just got to an age where he had the strength and determingation to suck my nipples out (DH can do it after all!)
Agree that they can be a tiny bit fiddly in public but you quickly learn to be discrete. Don't get me wrong, I didn't hate using them but I loved the day when I didn't have to use them anymore. Same goes for breastfeeding full stop, I guess. Felt liberating in some respects to stop when I went back to work.
DD1 is 4 days old and doing fine with the shields but I am more relaxed this time, having made the decision to use them earlier, therefore avoiding the first 48 hours of heart ache, struggle and screaming, hungry baby, losing weight.
This time round, I tried without them a few times in hospital and then thought 'sod it' - my midwife was ultra supportive which always helps.
I don't like using them because I find it easier to breastfeed in public (it isn't that much easier but I find it slightly embarrassing for some stupid reason.) I think I don't want to have to explain to someone why I use them. Having said that, noone ever asked with DS1 - obviously!
Some people say you can't use breast feed big babies for six months and some people say breast shields reduce milk supply. Neither of those applied to me last time or this time. DS1 was 97 percentile for weight and 99 for height.
Oh - and last time I sought loads of advice (and got loads of un-sought advice) from the 'breast feeding police' - if they upset you and make you feel bad for using them, then don't speak to them. You are doing the best for you and for your baby. A relaxed happy mum is the best kind of mum, regardless of nipple shield, bottle, etc.
Crikey - long post. Obviously close to my heart, this one!