Maybe so, f0dder, but I lost interest in Returnil when I found out that you cannot save anything to real disk, when Returnil is ON, but will have to bookmark*, reboot, and come back for a new download and install/save - with Returnil OFF. This is goodbye Returnil to me. The other apps in this category will AFAIK all offer ON/OFF without rebooting.
[Edit: * = you cannot even keep a bookmark!