I’ve been using LacTecks nipple shield for just over 24 hours & for 8-9 feedings & let me just say— WE LOVE IT. I’ve noticed even in 24 hours a boost in my supply (via pumping with LacTeck BabyMotion Flanges & pump schedule hasn’t changed one bit) & I greatly attribute this to the fact that my nipple is exposed to baby’s saliva & actual suck! I have very elastic nipples & this shield has been AMAZING. My baby gets the best feed I feel he’s ever gotten. I will say, due to my elastic nipples my nipple does stretch out through the nipple shield, but seems to be a total win for us! I’ve tried every well known shield on the market (Medela, lansinoh, nuby, haakaa) & this has been the most comfortable, easy & productive shield for us even in just about 32 hours of use! I LOVE the concept & design.