I really like my 5DII. I'm also really glad I kept my 7D, for the reason mentioned above - the 5DII is not an action camera. If you want better AF combined with FF, you need the 1Ds (and even then you don't get the frame rate of a 7D or 1D). The 5DII is particularly useful for indoor/low light (with a prime) or landscape shooting. The 24-105mm lens is a great deal as a kit and is a good lens for general use. I use a flash with it when shooting indoors after dark, or switch to my 85L.