I just moved to our new home and in the middle of it someone packed my m9s, luckily Amazon exists and I was able to have the m5 pumps delivered the same day after going 11 hrs without pumping!! Holy molly I never want to go through that again…not only I hurt the whole 11 hours, the next day my supply dipped 50%.
But it has bounced back, so here is my comparison between the two:
M5 has an amazing convenient store and pour system, I absolutely love it! But hate how much it hurts on the nipple, it also seems noisier. The battery life is short.
M9…I miss you! It is so comfortable on the breasts, it is my favorite out of all pumps, but the cleaning part is not as convenient, nonetheless, the battery life is great, it will last a whole day!