I had a G22, but it was just too darn big to carry concealed.
Yes, it can be done if you dress around it enough, but it really was never designed to be carried in such a manner.
I then bought a G27....
It is the best concealed carry pistol that I have ever used.
It is small enough and light-weight enough to carry all day, every day.
It shoots a very respectable self-defense caliber, yet it is still easy to control and make quick follow-up shots.
It is a breeze to field-strip or detail-strip, and parts are easy to obtain and replace.
It's extremely reliable and plenty accurate too.
And it offers the options of 9+1 rounds with a standard G27 magazine, 10+1 rounds with a Pearce extension or a Glock extended magazine, 13+1 rounds with a G23 magazine, or 15+1 rounds with a G22 magazine.
I like the Pearce extension quite a bit....
I like my G23 too, but even though they are close in size (especially if the G27 has an extended magazine inserted) the G27 is still quite a bit easier to carry concealed, even with the extended magazine.