I have not found one better as of yet - Cruxord Mag Release for Glock

For me, this is the best mag release going. It is metal and not plastic and there are no sharp edges. It is recessed more that stock as well as rounded. I actually reverse mine to use my strong hand's index finger to release the mag. My thumbs are short and I have to manipulate the firearm to reach it otherwise - not good! Fantastic item!