I have both the Glock factory extended release, and the Vickers Tactical on several Glocks. The Glock release is longer, and therefore easier to reach, but if you lay the gun on it's side on a hard flat surface and press on the frame, the button sticks out so far it will release the mag. The Vickers is slightly shorter and a bit less sharp-edged (more user-friendly), but still easier/quicker to use than stock release, so I prefer it on my carry guns.
"That means that no matter how we reform health care, we will keep this promise to the American people: If you like your doctor, you will be able to keep your doctor, period. If you like your health care plan, you'll be able to keep your health care plan, period. No one will take it away, no matter what." – President Obama, AMA speech, June 15, 2009.
see 13:20 - 13:58