“It’s worth installing the free version first to see how you'll get on with it. It's a very small installation, but it has plenty of features... definitely worth the money if you're trying to get as much performance as possible.” myReviewer.com Performance & Concerns

Both versions are known for their high-speed "proprietary defragmentation technology," which can often process a standard hard drive in under 10 minutes.

“Occasionally on program boot, I could hear the read/write head on my hard drive chattering—not a sound you want to hear... frequent enough to be disconcerting.” PCWorld · 12 years ago

and Ultimate (v4.12.0.4) are professional-grade Windows optimization tools designed to go beyond the basic defragmentation built into the operating system. While the Pro version focuses on advanced scheduling and performance tweaks for home users, the Ultimate edition is the most comprehensive, offering specialized algorithms for diverse PC usage styles. Key Features and Performance