They are very difficult to access in a front pants pocket when seated, such as at a table. Not impossible, but you have to straighten your leg to get to it. When entering a car it's better to take it out unobtrusively and have a place to store it with easy access, each vehicle will vary about that.
When walking or standing, however, you can have your hand on the butt of the pistol and it looks like the most natural thing in the world. When your hand comes out the pistol comes out with it.
There are proponents of various types of carry and many of them will try to denigrate every other style except their own. I think each person should assess their own needs and make their own decisions.
I do have a Crossbreed IWB for the Kahr .45 and 9mm's but sometimes the 9mm in the pocket is a better choice for whatever reason. It all depends.
