Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too much sway to be safe without mounting to wall.

Product components are constructed well (by themselves -- read on). The bike "arms" attach to the rack securely. However, the main vertical spine of the rack joins together so loosely, that there's too much sway in the upper portion of the rack with a bike mounted on it. Securing this rack to a wall is a must, or, adding hardware of your own to firm up the joints in the product. I would NOT purchase or use this product otherwise.