Same here. I think I used both Stacker and SuperStor at different times. They'd create archives and those would show up as a D:\ and C:\ was all transparently compressed and uncompressed. They were a bit disingenuous wit the "double storage." That's why you needed to make sure you had plenty of 'free' space before installing something, because the OS lied to you about the space available. That and there was a performance penalty too.