After using the Nenesupply pump parts for several months with my Medela Pump in Style, I can confidently say they're a solid alternative to the pricier original parts. The set includes everything you need - flanges, connectors, valves, membranes, and tubing.

The 24mm flanges are my favorite part. As someone with elastic nipples, the longer design provides much better comfort and suction compared to standard flanges. While I do wish they came in an oval shape for a more natural fit like one reviewer mentioned, the round shape hasn't caused any major discomfort during my 30-minute pumping sessions.

Cleaning is a breeze thanks to the detachable design. Each piece separates completely, making it easy to get into all the nooks and crannies. They dry incredibly fast too - a lifesaver when you're washing parts multiple times a day. The dishwasher-safe feature is nice for days when I'm too exhausted for hand washing.

Performance-wise, I noticed no difference in suction power compared to original Medela parts. The tubing connects securely without any air leaks. One thing to note - like another user experienced, these don't work with Medela hand pumps, so stick to electric models.

The value is unbeatable. At about half the price of original parts that need replacing every few months anyway, this set has held up perfectly through daily use and frequent sterilizing. Just pay attention to sizing - if you're between sizes or have larger breasts like one reviewer mentioned (34B found 24mm tight), you might want to size up.