Update: Sixteen more classes just opened!
Today marks the end of Prof Widow's Database class. Woot! One down and two more to go.
Overall, to me, the class was extremely useful. There were concepts I did not know of, or use before. I was glad that NoSQL was also covered cursorily.
There were also sections that I wish Prof Widow explained more. Transaction, especially, was really difficult to visualize. The interaction between multiple transactions is the crux of the problem but it was talked about very little. This is not anyone's fault because concurrency is indeed a hard concept to understand.
I would highly recommend others to take this class.