Using the PowerMode option, I found this is really fast and unbelievable in defragmenting my drives. I was wondering if I still need to use other defragmenter if I am already using PowerDefrgmenter GUI w/ contig.exe…. What really is the difference of using PowerDefragmenter GUI w/ contig.exe compared to Diskeeper Lite or other commercial defragmenters? Do they produced different results or does a different job of defragmenting the drives? Is this more “effective”? Is this really safe…what’s the recommended frequency of using PowerDefragmenter GUI w/ contig.exe? Lastly…what really is the difference of using the options PowerMode from other defragmenting options like just Defragmenting Disks?