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Full user review
"Excellent performance & ease of use compared to others"
Smart Defrag by IObit far exceeds Disk Defragmenter by MS and Defraggler by Piriform, offering three levels of defrag, scheduler, computer power down and the best Auto Defrag with user settings. It does not task my resources and is user friendly.
Smart Defrag missed some defragged files when analyzing alongside Defraggler by Piriform. However Defraggler missed some files that Smart Defrag picked up, so you weigh the scales.
In short, the other products do not offer the features mentioned in my Pro's section above. I am looking for performance and quality in a product (verified by the CNET Editors and rated by its users), with peace of mind knowing once it is configured, I can leave it to do its work. This is a great product and you should not be timid nor sorry to download.
I will add this... if you are looking for an all-inclusive product then check out IObit's Advanced SystemCare Free. I just downloaded this at work but still undecided on my verdict. It has excellent reviews from all and perhaps it will not task your newer computer as it has my work dinosaur.