Yes, SousVideMagic (SVM) is safe to use if you follow the equipment usage instructions & safety warnings in the User Manual. Pay special attention to your cooker's heater size your SVM model can handle.
From a food safety's point of view, SVM is just as safe as your regular oven. You must aware and understand food temperature danger zones and cook food to core temperature recommended by your local food safety regulators.
SousVideMagic is like driving an automobile, you are in total control and must obey government regulated food safety rules, equipment safety rules and high hygience standards. If you do it right, the results will be amazing and at the same time safe.