Full user review
"A powerful cleanup maintenance utility."
Powerful program that cleans the caches and log files on your computer.
Reasonably easy to use.
Its Free but it behaves very much like a pro / paid for App.
It can take a VERY long time to run (45mins) if you include the "Repair Permissions" Option.
A free utility that takes maintenance beyond "Disk Utilites" and its free.
Run Onyx once a month and be patient