I can't count the number of times I said "Ah ha!" while reading this guide. I've spent a lot of time reading the Canon 7D Manual, online forums, blog posts, etc and never could grasp some of the concepts described for my 7D. While reading this guide things just clicked for me and now I have much better control over my 7D and can see the results in the images I'm making now compared to those that I made just a few weeks ago. Highly recommended reading for current or future Canon 7D owners