Instruct: Classify the given review into positive or negative sentiment.
Query: convenient to buy as a set

It was convenient to buy these dumbbells as a set with varying weights from light to heavy. The neoprene covering is comfortable to hold in your hands and provides just enough cushion to (possibly) prevent calluses. I would have given this product 5 stars but I think the imprint of the number that indicates how heavy the weight is will wear off over time. One set actually arrived with a poorly imprinted weight number on it. It wasn't bad enough to return it, but I was disappointed in the lack of quality control to ship me a dumbbell that looked slightly defective.