i have 3 compagnies and  i tested lots of cck for joomla : k2, flexicontent, zoo and jseblod and i can said Mighty components are the most powerfull.

Why i say THE MOST POWERFULL  because  my first compagny did a dating website (with rmighty ressource, mighty touch, inbox, registration, ect...) and a picture shop webiste (with mighty commerce) we win  plenty of money lol thank you very lot