For me personally, I like the ability to have adjustable sights because I like to see holes in the "X"... I appreciate the very tight lockup that is loosening to butter smooth... I ended up using the standard small p320 grip (I have 5 other p320's that my twin boys love shooting, but they need the smaller grip). The tighter fit, adjustable sights (I'd already spent $120 changing front blade height multiple times to get the right POA>POI) - when I add getting four 21-round magazines and selling the X-Five grip module, the money was close to the same as a standard p320 full size and I now have the sights, trigger and magazines I wanted. YMMV... but this worked for me.