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

This salt grinder worked just a few times and now will not grind anything -it came filled with salt and 3/4 of that salt is still in the unit so it is apparent it has hardly been used before it ceased to work. I am doubly unhappy because I ordered both the salt and pepper grinders to have a matching set. Now I'm stuck with the pepper mill as it can't even be returned and no salt grinder to match.