Praise for Carbon Copy Cloner 4
I’ve tested nearly 100 Mac backup apps, and my favorite tool by far for making bootable duplicates is Carbon Copy Cloner. I’ve used it daily for years. Version 4.0 adds surprisingly useful features while making the app even easier to use and more accessible. Disk cloning is an essential component of a complete backup strategy, and Carbon Copy Cloner is the best way to do it.Joe Kissell, author of Take Control of Backing Up Your Mac
Version 4 of CCC brings a major update to the app, with a new interface that's intuitive and easy to use, new capabilities, and improvements to features we've been using for a long time.
Tom Nelson, Macs Expert at About.com