Dazzled at the time by the quality of Lightroom 2 and 3, version 4 brings together what I expected better for a software for cataloging and editing. The features of the editing section have considerably improved and made more rationally. It follows efficiency and friendliness tenfold. The print module is ... impressive. The book module is being validated and seems a priori very complete. The Internet connection has not yet been tested. In conclusion: the unconditional fan of Lightroom I found the cure with this version 4.