Strongly recommended mock exams for prep

My sister is a pro at choosing the right thing every time. She has got all the right friends and she even married the right person. That is the reason i always take her advice in every little step i take for my future, especially my career. So when i was to take the LSSA-GB certification exam, i asked her what should i do to prepare. She asked me to simply become a premium member of the Lean Six Sigma Green Belt paid mock tests with unlimited access and this made me trust her all the more.