I find it too heavy for pocket carry, unless the pants are tight in which case there are other issues with it. I carry in a jacket pocket sometimes. When driving I like it in the console. I have a belt holster, which is nice because the weight is mush less than a compact 9mm or .40.
In the warm weather I still find myself grabbing my KelTec P3AT, which is a good bit lighter than the R9.
But it's handy to have, in case I need to stuff it into my pocket quickly, or take off the sweatshirt.