G-27 is one of my carry weapons. As stated above, It is very reliable. If you have bigger hands get the pinky +1 mag extensions as it made the world of difference to me. I would highly suggest putting Crimson Trace grips on it. Can be found for around $175. I turns it into a PHD gun(point here dummy)
Pros:
1.)Reliability: you can bet your life on it going bang when it has to
2.)Small/Light
3.)Large amount of aftermarket "toys" (holster,trigger,guide rod... cheap too)
4.)Easy to clean
5.) Cheap ammo: I use Ranger "T" series (they replaced the Black Talons). $20 per 50rnds, great expansion.
6.)Magazine capacity: 11 rounds with extension
7.) Cheap: can be found for around $400 to $450
8.) Pretty darn accurate
Cons:
1.) It's a Glock, you either love it or hate it
My carry choices: Depending on what the situation is.
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My choice of ammo. Cheap enough to use at the range ($20ish per 50rnds) Make sure to get the "t" series. bonded are for going through glass.