I recently tried the One Full Set S32 Breast Pump Parts, and here's my honest take. First off, the set includes everything you'd need—27mm flange, milk collector cup, duckbill valve, and silicone diaphragm. The food-grade material feels safe, and the parts are soft against the skin, which is a big plus for comfort during those long pumping sessions.

The compatibility claim is mostly accurate. Like other reviewers, I found these parts fit my Lansinoh Discreet Duo pump, though not as snugly as the original parts. The suction still works effectively, but there’s a slight difference in how secure the flange feels. If you're picky about fit, this might bother you.

One standout feature is the closed-system design. I accidentally knocked over the collector cup once, and thankfully, no milk spilled into the motor—just as advertised. The duckbill valve does its job well, directing milk flow without leaks. However, I noticed the silicone diaphragm felt thinner compared to my original Lansinoh parts. It still functions fine, but it’s clear the quality isn’t identical.

Cleaning is straightforward—warm soapy water does the trick—but I did spot a minor defect on one diaphragm (a small cut). It didn’t affect performance, but it’s worth inspecting when you receive yours.

Overall? These are decent replacements if you’re in a pinch or want affordable backups. They work, but temper your expectations if you’re used to OEM quality. For heavy daily use, I’d probably splurge on brand-name parts down the line.