My opinion only here, Pro mags are fine for practice and they save wear and tear on your originals. Mec-gar seems to be the good aftermarket magazine brand. Ramline, Triple K and USA are iffy at best. I would rather have a 10 round factory mag that works, as opposed to a "high cap" aftermarket magazine that chokes. Even if a "off brand" magazine works great a few times, it does not mean the non-heat treated feed lips or follower spring will make it, long term. So, to answer your question, yes, they are good...for practice at least.