Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good for aerobic excercise...

I am a beginner, just needed something cheap so I could start to do some kind of excercise daily while my son napped. It doesn't do much as far as muscle building, but it is good for the price to get your heart rate up. It started squeaking a bit after about a month of use (daily), but I think it will be fine once I lubricate the moving parts. Good for the price.