Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Ineffective as pet deterrent

I bought this to deter my cat from jumping on my dining room table. No matter where I put the device on the table or how I set it, the cat only set it off if he knocked the device over. I tried with and without a tablecloth. It worked slightly better with the tablecloth off, but my table looks terrible without a cloth and the better performance may have just been because it tipped over easier when the table was bare.