The defrag process seems to be working faster with Diskeeper. Diskeeper will show disk defragment needed when restarting the system. I like all features of Diskeeper including all three products. Diskeeper has not disappointed me in any way so far, which is great, in my opinion. I haven't found any bad with Diskeeper, in my opinion. It seems to be a good product. Try it yourself. I have gotten good results when defragging. I am defragging my computer and freeing much computer resources for other operations at work. It has taken time, in my opinion. There is more time for other projects now that I am defragging with Diskeeper. I've used this software since it was first released at least 10 years ago - back when I used to sell support contract services (I am now retired). It has always been reliable and easy to use. This version takes a bit more effort to manage but not too much work at all. The interface isn't exactly user friendly anymore. You have to actually know what you are doing if you want maximum results. Diskdeleter can clear up space very quickly as well as increase overall reliability and speed.