The disk cleanup feature works nicely; hasn’t caused any major problems that I can see and freed up 2+ gig of my hard drive. The duplicate checker could use some work, however. It seems to check for file names only; in my case, it picked up files with the same name (but different created/last modified dates and times) that existed in different folders because they were linked to different items. (I am a gamer and use lots of mods and DLC, so I’m very careful about deleting files that relate to my games). I recommend using this with caution and checking every file to be sure it actually is a duplicate. Additionally, the registration/sign-in process seems to be broken - I can’t register the app with AVG (doesn’t show up in my account) and can’t login to my AVG account from the app. However, it’s free, so I really can’t complain too much. If the issues I mentioned above were dealt with, I’d have no problem giving it a 5-star rating.