Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Some re-assembly required...

purchased 5 for our church and we like the features. one problem was that 3 of them had the straps assembled incorrectly - attached to the wrong place or threaded through the buckle incorrectly so it was difficult to adjust. Fortunately we had one that was correct that was our model to figure out the "right way" so that the straps could be used easily.