It took two days from taking the course to passing. Of course, it is a great course just for the purpose of quickly obtaining a certificate, but I think it is also a great course for getting started with deep learning and TensorFlow. The course is structured so that you don't get bored, and the key content that can be difficult is explained really well in an easy way. I took the course after learning some deep learning, and it was fun to take it as a way to review what I had studied.