Please see the new System Refresh option in DoubleSpace 2:
This option restores your system to the same state it was in the last time you compressed it.
It does not require an Undo Disk, and it runs very fast. After rebooting, it just deletes all files on your disk (except those in excluded folders, and those that must remain like the Windows Recovery Environment), and then re-applies your WIM (which it does not delete either, of course) in compressed mode.
To be frank, it was simpler to code this behavior in this fashion; rather than having to interface with Microsoft’s one-click reset tool layering. However the net result is the same: a one-click reset experience.
Hoping this helps DoubleSpace aficionados everywhere