Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fun and Challenging Ab workout!!

This was fabulous...great variety of exercises both standing and on the floor. The instructor was so easy to follow and her cueing was perfect. Nice, bright set and upbeat music. The only negative (but not enough to rate it lower) was that the male exerciser seemed to be having some trouble balancing during some of the standing abwork which was a bit distracting.