I have been using joomla for a long time and have used many if not all of the CB and Sobi2 commercial and non-commercial extensions and this one is up there with the best. Simple, with good instruction - ( doing what its supposed to!) but most important (and the justification of purchasing a product) is the level of support. And Cedric is "the man"!!!
I highly commend him and his ability to support the product and any small concerns or issues you may have. He was even willing to make a modification at his time/effort and cost w/o charge. Simply outstanding and a credit to the man.
I live in Australia and speak no french but this is the "Crème de la crème"