When you put it in park the car can roll forward or back until it hit the internal parking pawl stop. I set the e-brake before i take my foot off the brake so three is less pressure on the trans parking pawl.
Agreed but, unless you use the parking brake on a daily basis and/or lubricate the cables frequiently I would not suggest using the p brake. I have had numerous friends use it and it ends up getting stuck on. Bad scenario. The parking brake however, does relieve stress when pulling out of park on a steep hiil. I have done this once and the popping noise/stiffness wasn't nice to hear.
I had one car that the brake cable would lock up when the tempatures froze and the vehicle had not seen wet weather for 2 weeks. After not being able to rock it back and forth to free it I gave up using the parking brake and on that car just hoped the Ford C-6 transmission did not break the parking paw which then they were known for.