How to remove those large wall rub art?

1)Aim a blow dryer at one corner of the graphic. Blow hot air onto the sticker until it feels warm to the touch.

2)Peel up the corner of the sticker with your fingernail. Pull it off in one piece, if possible. Heat the sticker with the blow dryer as you peel to keep the adhesive soft and make removal easier.

3)Rub the remaining adhesive on the wall with your fingertips. Unless the adhesive is old and dry, it should roll into small balls that you can then brush off the wall. Remove as much adhesive using this method as possible.

4)Mix equal parts ammonia and water in a spray bottle. Add one or two squirts of liquid dish soap.

5)Spray the adhesive with the ammonia solution, working in a small area. Rub the wall clean with a rough cloth. Repeat as needed until the adhesive is completely removed.

6)Wipe down the wall with a cloth moistened with clear water to remove any remaining cleaner or adhesive.

I am about to apply some of those decals to my wall. Are they all that hard to remove?