I use bettercut, but very slowly. When I choose an 'Activity' for the icon, I just hit home, and go check my e-mail or something (to kill time).
It takes 10 minutes to make 4 icons (that's if you know what icon's you're using).
Worth it when you're done though. You can uninstall Better Cut, and the icon packs completely, and the icons stay put. Worth it if you want your desktop to be prettier. My background matches my icons in colors (dark blue/black all around)