Instruct: Classify a given Amazon review as either positive or negative.
Query: Good workout for non-beginners

One should read the editorial reviewer's last two sentences with care (and the comments of other customers). This video is not for persons who are ignorant of basic yoga positions, because Yee doesn't teach them. This does not mean, however, that the video doesn't provide a good workout; physically fit people may be able to watch carefully and pick up the positions. (A friend who is a yoga practitioner said that she wouldn't recommend folks doing that w/o some prior instruction).