Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dangerous obsession

I was lent this book in the first instance and loved it so much I bought myself a copy, and copies for my friends. The only problem was we had just bought a Regency box piano and, though we are not exactly talented pianists, after reading this book we felt that we wanted to rush out and buy more pianos! Seeing as we couldn't afford to and it wouldn't be practical anyhow, space-wise, I think this book should come with health warning! We made sure we didn't come in contact with any pianos for sale for a few months till the effect wore off! That said...buy it, it's delightful.