i'm using the Medela Calma for my 12 day old baby. That's becos the confinement lady suggested she do the night feeds.. so in the day, i let baby latch on. in the night, CL feeds EBM with Medela Calma. So far so good... *fingers crossed*
I am very particular and only allow Calma to be used. Once I saw CL use the normal teat and was so upset!