I am not a big fan of FileVault. With my workflow, I just don’t need it. If you do need that level of security, FileVault is about as secure as it gets. This article describes how FileVault works with all of today’s current Macs. It contains suggestions about when and how to use it as well. The article is a bit technical, but if you are interested in the finer details of FileVault, it would be worth reading.