I used these bags while breastfeeding my first child and use them now with my secon child. The bags are very easy to use, convenient, and don't take up a lot of space in the freezer. I like that there's space on the bags to write the date and the amount of milk. The one thing I don't like is the thinness of the bags. I feel like it makes them a little more fragile and more likely to get damaged and leak. I think proper storage helps to prevent damage. I had one bag leak because it had torn a little bit from getting shuffled around in the freezer. After that I started putting the bags in a box after laying them flat to freeze. Since then I haven't had any problems with bags leaking. I would recommend these bags to any breastfeeding mom who needs to freeze her milk. They are small enough to fit into a cooler bag if a woman is pumping at work, and then can be quickly transferred to the freezer. The milk can be thawed by putting them in the fridge or for immediate use, the bag of milk can be held under warm running water. A great product overall.