It takes some getting used to but now I just check around behind me before I get into the car and then just back up using what little visibility I have. You can see enough to feel comfortable once you do it once or twice. To change lanes I just nail it and pass the car in front of me before changing lanes so I KNOW whats beside me.
As for the A pillars, yes they block your vision in a left curve and take some getting used to.
Front visibility is greatly aided by removing the wipers. I keep them wrapped in a towel in the trunk just in case I get caught in a surprise downpour. No tools required.