Wow… I think you are being incredibly generous. I’ve been an engineer since ‘96 (Intel, Apple and Microsoft) and couldn’t make it through week three. The material was a joke. Siraj is a joke. The “mentors” knew less about ML/DL than I did (which wasn’t much at the time). There are $40 books which cover way more, with sufficient depth, while remaining approachable. I wouldn’t recommend that nanodegree even if it was free.