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.
“It is foolish and wrong to mourn the men who died. Rather, we should thank God that such men lived.” -- George S. Patton