Instruct: Classify Amazon reviews into positive or negative sentiment
Query: great back swing

High quality, nice design, good customer service (a piece damaged in shipment was replaced with no hassle). Compared to my old American Sports back swing, on which the nylon finally gave out after 25 years, this is higher quality everywhere, and the curved handles are a handy feature for pulling yourself back to upright position in case you're not balanced perfectly. The only downside is that assembly is not easy or obvious, and the instructions are incomplete and poorly written.