Recently got one of these with my brownell's gift card (thanks PF!) and have to say so far I am impressed. I put 210 rounds through just it yesterday during less than ideal conditions and no malfunctions so far. We have had steady rain here for the past week and it made the range a nasty mud and clay mixture. I dropped the mag quite a few times (slippery) and decided to just see how it would go muddy/with muddy rounds and it kept working. We tried it in a gen 3 glock 19 mag and a gen 4, kept going. Gonna keep getting after it but so far so good for a $15 mag.