Glocks are great guns! I don't think they're up to the shootability of a good 1911 but then again 1911s don't carry 17 rds or shoot 9mm or 40 S&W very well. There are a number of things that I find admirable about Glocks. The only two things I really don't like are the issue sights and the grip shapes.
I think Heinie has designed the best sights available for the Glocks either the stand by regular sight or the new "Slant Pro" with or with out the "Straight Eight" night inserts. That solves one problem and I can happily do it for you.
The next problem is grip size. I can make the frames "feel" and point differently and shave some off the grip size. It is not a enormous amount but it is noticeable and helpful. The smaller your hand the more you'll notice it. Take a look at some of the Glock testimonials or call me if you have questions.
The two most popular modifications are cutting down the grips to the next smaller model. A G21 cut to take G30 mags or a G22 cut to take G23 mags both make very nice and easily concealable carry guns.
You can read more of my thoughts on Glock modifications here.
High Grip - This cut removes material from the area directly under the rear slide rails and makes the gun feel slimmer.
Trigger Reach Reduction - This cut removes material from behind the trigger on the frame and allows for a shorter trigger reach.
This package completely retextures your gun and removes any finger grooves on the newer guns. This is the smallest grip frame available on a Glock that I am aware of. This combination of modifications is what I have found is what most people need to get a Glock to better fit the human hand. The finished pistol gives a cosmetic finish that I am willing to send to my customers.