Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Been using it for years

Not consecutively, I'll admit--but when I get the urge to work out at home, this and Billy Blanks are my go-to. Denise does a great job cheering you on, explaining moves and what muscles you are using, reminds you to stand straight and tuck in that tummy, she is fantastic. I have several from her collection so it was no surprise when this became one of my favorites. This is not a hardcore P90X/Insanity type workout--this is a nice beginning for those who are out of shape, out of breath, and not too coordinated. 5 times a week, in the morning before the kid wakes up, and I feel fabulous.