I've only put ~200 rounds through it so far, but I absolutely love this thing so far. Takes my Umarex (VFC) G45 mags, and the Kizuna Works mag fits in my G45 too, which is nice. It handles 0.32g BBs great, hop is easily adjustable from below (via trigger guard), fixed outer barrel is a nice upgrade, grip feels great, and slide release is easy to manipulate without adjusting my grip. Very happy so far. I believe the trigger is also adjustable, would assume from the trigger guard as well, but I've been happy with the trigger so far, so haven't looked into changing it.