I cut my teeth on an XD-9 Service. It was my first gun 3.5 years ago when I got my license. I've since purchased half a dozen various handguns.
I have over 3000 rounds through it. Good gun. Very good. Never, ever a hiccup whatsoever.
It always bothered me that I was limited to 10 round mags since I am in the great state of New York.
So, after procuring some preban 15 round G19 Mags, I plunged $500 down on my first Glock.
Here's my impressions of the two guns (and a very informal review).
Accuracy appears to be about the same. Reliability as well (although I did have one stovepipe on the Glock) but I'm still at the point only have a few hundred rounds through it.
The Glock is quite a bit smaller, in just about every dimension, especially height. It is a hair slimmer but that hair translates into an entirely different comfort level for IWB Concealed Carry.
For those in Ban states, the ability to get preban magazines is a huge advantage for the Glock.
I don't like the magazine release on the Glock. It's hard to press. Springfield is much better there.
Also, I don't care for the Non-Drop Free Glock Mags. As I understand it, preban glock mags are pretty much all NDF design (NFML). That sucks.
Disassembly of the Springfield Mags is also much better than the Glock Mags. I can't believe you need a special tool to disassemble the glock mags. How stupid! I have to get one now!
The Glock is several ounces lighter and feels more balanced (like a lower center of gravity).
I also like the disassembly / reassembly of the Glock itself much, much better. I LOVE how when re-assembling the glock, you simply slide the slide back on and are GTG. The springy has the take down lever which you have to move after locking back the slide. It's a little difference but it made a huge impact on me.
One thing I don't like about the Glock is that there is some sort of uncomfortable chaffing of my middle finger (of my strong hand) by the bottom of the trigger guard. I can't figure out why. None of my other guns did that to me. Any suggestions?
I think I want to get night sights for my G19. I thought I'd like the ball-in-the-box sight but I don't really. Gonna get me some metroplights.
Going to look into some sort of extended mag release perhaps. Hopefully it will make dropping the mags much more ergonomic.
I'm going to start a quest to find FML preban mags (if such an animal exists).
Those three items would make the G19 the ultimate carry gun for me! Maybe I'll sell my XD!