Not bad! Dig out the old stuff on the backside and on the glass side and when you roll the metal "c" out, just keep rolling it forward as you go across the windshield. (It will resemble a pig's tail when you remove it) be careful not to break the windshield by just tugging on it.
Clean out the gutter, soapwater (lube) up the new trim and windshield and press it firmly in, one end to the other, inch at a time.