Instruct: Classify Amazon reviews into positive or negative sentiment
Query: cheap but still not worth it

The product is built well, sturdy and so forth but just doesn't really do much for you because of the balance and inability to really stick in the ground as you pedal harder. Honestly you can get the same benefit by pedaling your feet in the air with shoes on to give some weight as you pedal. A nice try at a product but not close to successful for what it wants to accomplish.