A year or so ago, I decided to stop struggling with an Uncle Mikes pocket holster and actually spend a bit more $$ on a pocket holster. After some bit of research and reviewing lots of user comments, I bought a Mika Pocket Holster, made by Robert Mika. I like it 'cause the price is okay, and it works. It's easy to draw the pistol (mine is a PM9), the pistol fits comfortably without any tightness that requires thumb press, and the holster's shape covers the trigger guard without taking away any access to the grip, which is small enough to begin with. He uses some sort of lightweight leather-like material for the body, which is belted with a 'grippy' material that leaves the holster in the pocket. Altogether, it holds and protects the pistol without being 'possessive'. My PM9 slides in, and out, without hesitation. I like mine, it's very comfortable, if you gatta carry a funny shaped lump of metal and polymer in your pocket. He also makes a IWB and a vest style holster.
I just found a video he posted on YouTube back on August 8th this year, where he explains a bit about his design.
In communicating with him when I bought my pocket holster, I discovered that he is a very nice guy. It was a pleasant and enjoyable experience.