I too have commuted on PM's and reserve. I have never ever encountered difficulty in dealing with scheduling; I've used the commuter clause and never heard a word about it unlike at the regional I worked at before.

I will say however, that the commute home on a PM from a western domicile can be challenging on SWA, and more often than not I was on an AA or Spirit jumpseat. That being said, who knows what schedules the new res system will unleash?