I've been carrying a Gen 4 G27/26 for almost a year, and absolutely love it. In .40 cal it is a little snappy, but nothing like the Shield I had.
Problem was I shot it well, but not great, so I dropped in a Lone Wolf 9mm conversion, and ended up with a soft shooting pistol that I shoot extremely well.
For a $135 I got the barrel, 1 - 15 round Pmag, 2 - 17 round Pmags, another $26 for a new 9mm ejector, extractor, and spring loaded bearing. The last three weren't a necessity, but were cheap enough and easy enough to replace.
That brings me to another YUGE plus for the Glock, cheap, ready available, easy to replace parts, and a gazillion accessories.
With a small nail, or punch you can completely take down your Glock in under a minute. I replaced my sights in about 10 minutes with a $7 front sight tool, a small block of wood and a vise. Just put a new flat-faced trigger shoe on my old trigger bar, take down, replacement and reinstall just over 10 minutes.
If you like to customize, experiment, and DIY, then a Glock is hard to beat.
That's my .02, YMMV.