Okay, so I was skeptical at first because it's not the 'real' Medela, but this Maymom kit is actually a game-changer! The price is way better than buying individual Medela parts, and everything fits my Pump in Style Advanced perfectly.
The one-piece flange design took some getting used to (RIP my DIY sports bra pumping hack), but it's actually easier to clean than the two-piece Medela version. No more scrubbing tiny crevices with a nipple brush - just toss it in the dishwasher!
Pro tip: The valves and membranes work exactly like Medela's, but you get way more in this kit. Those little membranes disappear like socks in the dryer, so having extras is clutch.
Only downside? Doesn't play nice with all hands-free bras. I had to upgrade to Simple Wishes (worth it though). After using these daily for months, I've saved enough on parts to buy my baby some fancy toys!