Its easy if you have like a little crack.. but when the entire windshield is shattered is far more difficult.. our shop charges $100 canadian just to remove a windshield.. first you have to remove the mouldings, than use piano wire (special tool) to cut the old rubber out from the frame of the car to the windshield.. than you you have to clean it very well.. than you urethane to put the new windshield back on with tape to hold it down.. it sounds easy.. but I wouldn't recommend doing it yourself...