ETS speed loader works great

It only took me 1or 2 tries to get it down pat. Loaded 11 double stack and 15 single stack magazines in less then 20 minutes. It is effortless to use my only issue is that if you don't push the top plunger (?) Down hard and fast the last cartridge might not load, but other than that minor thing I love it and would say that If you have a lot of mags to load it's a must.