Feed back on black belt IASSC exam

Dear all,
Some comments and testimonial from France where i passed my exam last wednesday regarding IASSC black belt i want to thanks processexam for the good preparation they propose, regarding the question data base that are very close to the final exam after a deep review of all the modules of DMAICS i practised 3 weeks by making app 300 questions per days i highly recommand process exam for IASSC certification once again thanks a lot process exam team!