Whats everyones experience with smoking while breastfeeding? Negative effects? Positive? Long term risks or consequences suffered?

I smoked during pregnancy maybe a total of 10-12 times as absolutely needed and my little girl is perfect! She was born 3 days ago and is advanced already! She’s already great at breastfeeding since the minute she came out. The drs were impressed. She even slept 4 hours through the night last night, her 3rd night. We were warned the 2-3 night were the worst and her 3rd was great! I have not smoked since I was 24 weeks and won’t while breastfeeding until I get enough facts and research. Just seeing what everyone’s experience has been both long and short term. Thanks!