A few years ago, I found the Glock 43 to be a good match for the size handgun to fit my concealed carry purposes.  Unfortunately, that size of the grip doesn’t fit my moderately large hands very well, and the six-round capacity left a bit to be desired.
 

I had positive experiences with a plus two mag extension I was familiar with, and it was a solution I had some confidence about.  That converted my Glock 43 to an 8+1 capacity and gave the space for all my fingers to get purchase on the grip, even if part of that grip was the magazine itself. 
 

While it works in a pinch, the solution where part of the grip vanishes during a magazine change is not an optimal solution, and I never like to give up a solid wrap around the weapon.  Additionally, ‘works in a pinch’ is an intentional pun, as that is a typical result of rapidly
inserting the fresh magazine into the shortened grip.

In handling the alternative firearms in the same category, I found several to have similar issues fitting my hand, and some which felt even smaller and would add to the difficulty in control.
 

To the rescue comes Glock 43X

Thank you, Glock, for delivering the 43X with a grip that fully fits my hand with a place where no finger is left behind.  Now I can get a full grip on the gun, keep the grip through a mag change, and no longer rely on magazine extensions to reach a reasonable capacity.  As a bonus, I no longer have red blisters on the pad of my hand.  The other features of controls, grip angle, the familiar if not amazing trigger, are all what I have become accustomed to over years of use.
Yes, I used the words ‘reasonable capacity’.  Ten rounds surely isn’t optimal, and a lot of smaller guns are delivering more capacity in a smaller package, but I am a fan of not making magazine customizations when I don’t need to.  It would be great if there was a 15 round magazine with less negative feedback than I have heard about the Shield S15.
 

But my eyes are aging, so here comes 43X MOS
 

I noticed more in the past 18 months that my front sight has become increasingly blurry.  Perhaps due to a career of staring down illuminated screens, or perhaps due to age, the
lens of my eyes appear to have lost their youthful flexibility.  Without a crisp image of the front sight, the age of RMR popularity came with perfect timing for me, and the 43X MOS option was there just when I needed it.

To me, all the Glocks feel very much the same when I can get my hand around the grip.  I find the grip angle comfortable and natural.  I have experienced enough of cheap and unreliable firearms to appreciate what Glock gives me in a still inexpensive but reliable function, and I appreciate that I can be certain of the controls and assembly process blindfolded without having to adjust when I pick up a different model.