My milk always tasted "off" or soapy after freezing. My husband noticed it when trying to feed the baby and I did too when I checked some. It was definitely collected and stored correctly and frozen in a deep freeze. Baby generally refused or took very little - luckily I was never away much. Since I did not use pumped milk much, it was in the freezer for a while -- weeks or months. Seems I've heard/read that some of the components break down - it is safe to use, but not as tasty as fresh. I should know this - anyone care to elucidate? Laurie Wheeler