Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointed

I have several Case knives and they've all been great. But, I regret buying the Sod Buster. It was dull right out of the box. Even worse, it absolutely would not take an edge. The blade shape isn't very useful. Too fat and not pointed enough. It's more of a glorified paring knife, except my paring knives are sharper.