Just don't roll them all the way up or all the way down. Keep that pressure off the regulator and it'll never break because pressure's bad, right?
It's not that difficult a job to do, front or rear glass. But you will want to keep a couple of suction cups in the car as when they fail the glass goes to the bottom. Pay attention when you raise or lower the glass, if you ever hear the sound of cracking plastic when the window hits the top, your regulator plastic just cracked and you need to order a new regulator right then, that day. My car has 4 new regulators put in over the last two years, every single one of them announced failure with a slight CRRKK sound when the window was rolled up, and every single one of them had cracked plastic somewhere on the regulator.