I've used the Glock magloader, and others as well. Save yourself time and money and invest in one of these.
http://www.magloader.com/index.htm
They are inexpensive, simple, small, fit into a shirt pocket, and work unbelievably well. Best of all it has no moving parts. Beats hauling around these other contraptions that you almost always forget when going to the range. It will load
ANY magazine regardless of size, shape, or compacity. Bill T.