I am very close with a fellow that was riding shotgun in a side by side ATV while speeding through a field of wheat stubble. He was in hot pursuit of a coyote. The bouncing of the ATV caused him to miss with the first 10 shots, and hit the coyote on the 11th. This made my friend feel like he made the right decision that day. He decided to carry his Sig P226 with a 20rnd magazine instead of his XD40 with only a 12 round magazine. Since I am aware of this, I like to have the option of extra rounds in my magazine....
If I am carrying my Glock for defence I will only use the 15 round magazine. If I am carrying it for offence, I may want 5 more rounds. I don't want anymore than that though, because I carry my pistol in a Hill People Gear, Recon Kit Bag....
I ordered the extensions I posted a link to this morning. I will let y'all know how they work out for me.