As an exclusive pumper, I've tried countless replacement parts, but these Nursi Luna 24mm pump parts genuinely surprised me. The first thing I noticed was how the wider bottles actually hold more milk without tipping over - a game-changer during those 3AM pumping sessions when my hands are full of baby wipes and sleep deprivation.

The suction power is impressively identical to OEM Spectra parts. I actually did a side-by-side comparison with my original flanges and couldn't tell the difference in performance. Though I'll admit, removing the duckbill valve requires some elbow grease (pro tip: keep a dry washcloth handy for better grip).

What really won me over was the longer tubing. The original Spectra tubing always felt like it was yanking my pump off the table, but these give me that extra 6 inches of freedom to move around while hooked up. They've survived daily sterilization in my Baby Brezza without warping, though I do agree the bottles feel slightly thinner than originals.

For moms who pump frequently, having this affordable backup set means less middle-of-the-night washing marathons. Just be aware - while they work perfectly with my S2, the bottles don't snap into the pump's back compartment like OEM ones do. Small tradeoff for the price and performance!