I've had both the normal safety lever and the inch-style extended version:
If you have small hands and cannot manipulate the normal lever, the extended version will help.
If you have medium to large hands, it will depend on the grip. If you have a Falcon Industries Ergo grip, the normal lever is a better choice because the ergo grip is thin and smaller than the other FAL grips. If you have the standard FAL grip, a SAW grip or a PSG-1 Style target grip, you'll likely find the larger safety more comfortable as all of these grips are on the blocky or large side.
If you have large hands, the extended lever might hurt more than it helps. I have medium-large hands, and with the rife with the Ergo grip on it, the larger safety was so far extended that it dug into my thumb between where it joins with my hand and the knuckle (I couldn't work my thumb onto it without changing my grip).
Putting the safety down into the FIRE position usually is not the problem, it's putting it back up to SAFE.
I put the extended safety onto a target FAL I did with the PSG-1 style grip and it works great in that application; I kept the normal safety on the rifle with the Ergo grip.
If you have any questions, let me know.
