Point everything a little bit honest reader will share: execrable layout. Tiny pictures, but located at 2 pages corresponding comments. Not very convenient to illustrate an effect, right?
Then, I have not always understood its positioning. This is not a book for beginners, you must go to the side of Kelby for it. But on the other hand, it contains so many "small talk" when practicing LR recent years ...
References are constantly made to Photoshop, which will surely delight Photoshop practitioners wishing to make RS, but very énervera, but then very deeply, LR practitioners who will never use Photoshop.
I think there is now video tutorials, free or not (including those from Adobe - in English, a good way forward ;-) that are extremely well made and full of all the features of LR4. And at least in video, the effect is clearly seen :-)