5 STARS ALL THE WAY! I can't BELIEVE the top two that "others" recommended were SLCC (Snow Leopard Cache Cleaner) and OnyX. Having used BOTH (OnyX not being as bad as SLCC, but that's not saying much), this app blows them both completely away. In fact SLCC (which I PAID for) I DUMPED because it was so pathetic, and the ONLY reason I keep "CleanMyMac" (which I ALSO paid for) is that the "Language Files" cleanup is worthwhile - otherwise, it is FAR too high-maintenance, causing you to make SURE that you aren't going to let it "clean" an often VERY necessary file. With IceClean 3.4.5 not only do you not have that worry, the additional functionality built in is FANTASTIC. I ESPECIALLY like the "Whois" that I can use in conjunction with "Hands Off!" to see EXACTLY which domains those IP addresses that pop up asking for "permissions" are - which previously I would resort to "Better Whois" to identify (a tedious method compared to having it right at hand in the IceClean 3.4.5 app. Everyone will naturally have their own "opinions" of what the "best" cleaning solution is - but I for one am VERY happy to have chanced upon IceClean 3.4.5 via MacUpdate (a MUST have in itself), and intend to make a donation as soon as my financial situation allows me too. I ONLY WISH I could get my money back for SLCC, AND CleanMyMac, and donate it ALL. So there's my "review" for what it's worth. If you haven't given IceClean 3.4.5 a test drive - do so ASAP!