I’ve had 2 significant game changers. I had the M9 pumps and they kept breaking and it was so stressful. I finally got the M6 and just wish I would have gone with that in the first place. Game Changer! Then my husband surprised me with the Bottle Washer! Complete game changer!!! I don’t have to stand at the sink multiple times a day scrubbing and cleaning pump part or bottle anymore. Totally worth it!