This is an absolute lifesaver. Apple should buy it and add it to OS X -- it's the utility they forgot to include to make it easy for Mac users to back up their Windows partition, not just their OS X one. Makes it a cinch to adjust your Boot camp partition size, because you can back up your Bootcamp partition with Winclone, delete the bootcamp partition, create a new one of a smaller/larger size, and then restore the backup with Winclone. That's really its killer feature -- the target partition size can be different from the originally backed-up one.