The easiest way to pump! Oh my goodness. No unnecessary parts and bottles to deal with or clean. The bags freeze well and store nicely with the holder. My baby girl feeds well with the bottles too!
I prefer that we have options to choose which adapters and nipples included. I only need slow flow nipple since I'm partially breastfeeding. Medium & fast flow nipples won't get used. I need to purchase another 2 pack of slow flow nipples.