You will see the benefits after you've done it mate. Believe me I was thinking like that before I done mine, but after your car will look so much better.
Heat up a small corner, with a hairdryer, then if you take your time and peel slowly it should come off all in one. Then you will probably have some stuff left on the window, like glue stuff, so just give that a wipe over, i just kept using window cleaner ( nearly a whole bottle
lol) and an old cloth, then once its all off give your windows a fresh clean with a fresh cloth.