I've only been using them for about a month now but I haven't had any issues. I prefer the feel of a Glock mag with a Taran extension. There's a little more weight to it, personal preference. I also have had some situations where the extra 2 rounds with the Taran has eliminated the need for a reload. That being said, for the price I don't think that you can go wrong. They're reliable (so far), relatively easy to load to capacity, easy to disassemble for cleaning, and most of all CHEAP. Only time will tell for long term durability.