Yes and I didn't want to believe it until I saw jr for myself. What a lot of ppl don't know is that the pump mostly takes out the milk from the front ducts in ur breasts meanwhile ur babys suction is so much powerful which was hard for me to process lol that they get the back ducts. My lactation consultant told me that. But then a couple of weeks ago I took aspirin not knowing u couldn't u take it while Bf and so I was pumping and dumping and my boobs were just so engorged I developed a lump in the back ducts that only my baby was able to empty out. Mind you it was not the pump Bc I have a medela in style which supposedly it's super good.