I have been carrying a Glock 27 for the last year in a Sidearmor IWB (inside the waist band) 4th Generation. It's the best holster I have ever owned. Carries the weapon very secure to my side, comfortable to wear, and hides the gun extremley well.

http://www.sidearmor.com/cart/catalo...ation_IWB.html

Of course each person is differn't and will like something differnt. I also carry in an OWB (outside the waistband) during the colder months when I'm wearing a jacket. Blade Tech makes a very good OWB holster.

The Sidearmor though gets worn the most because I'm a t-shirt wearing kind of guy and the holster hides it well with a t-shirt.