Just got these Nenesupply valves and membranes for my Medela Swing pump, and here's the real tea...

First impression: The packaging is basic but everything looks clean and well-made. Not gonna lie, I was skeptical about non-OEM parts, but these actually snap onto my pump bottles BETTER than the original Medela ones! The fit is snug but somehow easier to remove for washing - weird but welcome magic.

Pumping performance has been identical to OEM so far. No suction issues, though I did notice the white plastic is slightly more translucent than Medela's. Who cares about color when they're hidden inside the flange though?

Major win: The price! Getting 4 valves + 8 membranes for less than half of what Medela charges? Yes please. As an exclusive pumper who goes through parts like crazy, this feels like finding money in last season's nursing bra.

One heads-up: Be gentle removing them. One reviewer mentioned cracking a valve during removal - I've been using a butter knife to gently pry them off without issues.

Final verdict after 2 weeks: These are legit. Not 'exactly' Medela, but close enough that my boobs can't tell the difference. Will definitely repurchase!