No, if you value security, compliance, or sanity.
Because the tool requires you to disable antivirus, you are opening the door to potential threats. While the original Ratiborus release is likely safe, the problem is distribution. Office Installer 1.2.5 by Ratiborus
He is banned from Microsoft forums but celebrated on sites like Ru-Board.com and nsaneforums.com. No, if you value security, compliance, or sanity