I took the DELF B2 last June, and my experience was that the written portion was harder than I had thought (mostly because the time is so limited), and the conversation portion went much better than I had feared. I took a DELF preparation class at IFAGE (www.ifage.ch) which was very helpful in getting to practice with materials like are used in the exam. You can also get some sample tests from the DELF/DALF website which I found useful.

Good luck!

Thanks Louis, just one question.. do you remember the name of the book on which  you worked in Ifage?. regards

Firas,

The IFAGE class didn't use a book. The teacher had lots of handouts that she had made up, and some other things we did in class. She recommendeda few books (Réussir le DELF B2, Préparation à l'Examen DELF B2, Activités pour le CECR niveau B2), but I didn't use any of them myself, so I can't speak to how good any of them is.