Instruct: Classify Amazon reviews into positive or negative sentiment
Query: HORRIBLE reliability!

Love the concept, makes great coffee when it works but has serious reliability issues. This thing has had problems from the get go. First it was de-calcification issues and now it's something electrical. Can't program it at all and only works on the brew setting on random mornings after unplugging it and plugging it back in repeatedly. We've already exchanged it once. Now it's going back and we're shopping for a different coffee maker altogether!