ITreviewed posted a review on Raxco PerfectDisk 10 Professional

Using PerfectDisk is a joy and it's always great fun to see how much space you can recover from your hard drive - PerfectDisk even shows the before and after performance of the drive, the type of files moved, and how frequently modified each file normally is. The software is easy to use, and there are plenty of settings and reporting for advanced users. Besides the effectiveness of PerfectDisk, those with older (slower) machines will appreciate the software's low footprint and the way it allows you to get on with your tasks without dragging your machine to a crawl - it doesn't overload the CPU and RAM like many utility programs sometimes do. This is an obvious advantage over the typical Windows 7/Vista/XP Defrag, which typically cuts performance horribly. If you are currently using PerfectDisk 8 or 9 there might not be enough to temp you to upgrade, but if you don't have a third-party defrag program on your Windows computer, buy Raxco's PerfectDisk 10 and you won't regret it.

Raxco PerfectDisk 10 Professional Review