Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Well done!

The promptness is outstanding. The information presented in the DVD is also outstanding. I've never seen "completing the square" done the way Steven has presented it. Looking through numerous pre-calc textbooks and advanced algebra hasn't, as of it, found the way he presents it.If there is any 'cons' to this would be the volume. A little too low for the older crowd. I also like the train in the background--but that's another story.