Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No improvement in the 6th addition

This is a very expensive edition update from the popular 5th addition and offers no real enhancements. The textbook price of $160+ is ridiculous and deal breaker for many math teacher and parents. I highly recommend staying with the 5th addition and buying from the robust used market. The web based support seems to be left up as it should be.