Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst textbook I've ever had

Had to use this textbook since it is written by a professor in our school. This is the worst textbook I've ever read. It omitted the proof of almost EVERY theorem. The proof is left as exercise. Seriously?!!! Being concise is good, but being lazy is lame!!Rudin's book is much much much better than this one.DO NOT buy this book.