Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst UMD case I own

This is the one Amazon purchase I truly regret. Instead of being a fold-out case, it stacks the UMDs on top of eace other so you can only see the top four. I don't use it at all as the prongs seem likely to damage the UMDs within. Spend the extra two dollars and buy something better.