Used it, and it worked great. Cleared up a surprising amount of clutter from my hard drive. As Wizard1956 stated, it doesn't go too deep into the registry, but I don't necessarily want it to, either. No problems whatsoever. I would recommend.

love this app. been using this for about 2 years now. works great on my system. they also do a great job of regular updates as well. all hail crap cleaner!

Another great feature of CCleaner (one I use the most) is the uninstaller. It loads much faster than Add or Remove Programs. It is practically instantaneous.

First use, and review - my son gives it 2 thumbs up! Ran it on his second computer and it really made it peppier. Now on to the main machines (and I ran the reg cleaner as well - no problems).