I've been using this for just over a week now and so far so good. I had one glitch whereby I hadn't moved the preference file into (/Users/<username>/Library/Preferences). I'd emailed the developer and had a prompt and helpful response which solved this. It's worth a note that I had to switch off FileVault to successfully install this (Switching it back on after installation is fine). Overall I'm very pleased with this extremely useful script.