Wear 5.11 to work almost everyday. I have one pair of the Propper pants and a couple pairs of the LAPG brand. The 5.11 wear longer than the others and the LAPD feels cheap when you compare the two. The propper material is heavy, fine for the winter, but too hot in the summer. I also dont like the pocket flaps on the propper, too big.
As for fit, they are pretty close to the same sizing between the 5.11 and propper, and the propper legs feel just as loose as the 5.11 does. I find the 5.11 have more room in the hips and butt area. With the propper I find myself having to pull up my pants to squat, whereas with the 5.11 even if they are sagging a bit, I can still squat without having to adjust them.
As mentioned above, buy through amazon, and they pay the return shipping if you dont like them, just leave the labels on until you are sure you like them.