There is a very extensive (60 pages or so) analysis of the book in french here:

http://www.les-crises.fr/piketty-le-capital-1/

http://www.les-crises.fr/piketty-le-capital-2/

http://www.les-crises.fr/piketty-capital-3/

Check the unforgiving and long conclusion here:

http://www.les-crises.fr/piketty-capital-4/