I know many of you are into testing various applications like Shadow User, Deep Freeze, Bufferzone, FD-ISR, Sandboxie and all of those. The only one I have used is Deep Freeze. However, I have not used it on personal computer. What arguments for/against these programs are real versus just preference? I know they are not all designed for the same objective, but close in their mission. Does one stand out for ease of use? Other similar apps I should look at besides those mentioned above? Comparisons, warnings, suggestions are welcome.