Window insulation kit works

This year I've noticed the draftiness of the windows in my home. It's so bad that my bedroom is actually 8c colder than the rest of the house. One day I will get nice new windows but it's not in our budget this year. My brother had suggested using the window film that goes over the window casing and your shrink it nice and tight with the heat of a hairdryer.

First of all I didn't think this stuff would work too well. I mean, how much could a sheet of plastic hold back the arctic air. And second, I like to open the window to get some air once and a while even if it is Winter, this stuff seals the window until it's removed.

To make a long story short, the first thing I said after walking into my bedroom was "This shit works!". If you have drafty windows, give it a try. I can live without opening the window until Spring. The only concern I have now is if my cat will tear it up bounce off it if he tries to lump onto once of the window ledges.