Things I liked: This mag is a bit pricey for what it is, but it is very well built. I am using my KWA ATP with Laser-Ammo targets and keep the loading lever all the way down so that I can take multiple shots without any ammo. I get between 16-20 shots per mag which forces mag changes like real life. The weight is also realistic for a fully-loaded Glock 17 mag.
Things I would have changed: Nothing but the price :-)