Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Excellent overview of developing boat geometry.

This guy really spent some time on this, he explains very thoroughly how to develop the geometry for setting up to build a carvel plank boat. It's very high quality too, it doesn't get grainy or degrade when you make it full size on a big screen. I must say, this video is the most comprehensive explanation of lofting and developing boat geometry that I have ever seen. I have almost every boat building book there is and it's hard to understand lofting in a book. This is not a video that you watch once and then it just sits on a shelf. This video is going to keep me learning for a long time because there's so much information in it. This video is worth a lot more than 30 dollars. Five stars for this video.