Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Never buy this product!

For some reason Black and Decker decided to replace the tried-and-true push button with a timer dial. The dial on our unit never worked well and was hard to control before it broke. Then, at about six months the timer broke entirely and won't work at all now. Hence, the toaster is totally useless and non-functional. I called for warranty service, but I didn't have my receipt. The customer service rep told me to look for codes on the unit's plug that would help her determine the age of the unit, and therefore whether it would still be under warranty. I found the codes, and her immediate response was, "nope, not under warranty, it's more than a year old." When I asked how old the unit was, based on the codes I supplied, her response was, "I'm sorry, that information is proprietary and for our use only."This is a horrible product design, and no one should buy a unit like it until Black and Decker changes it.