Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Didn't work out of the box

It wasn't calibrated when it came so I attempted to do it via the instructions included. It was difficult to get the glass off the front and I ended up cracking it. I didn't feel like dealing with it so I sent it back. The product looked sturdy and I was excited when I first put it up...until I realized it wasn't reading the right temperature and I had to try to calibrate it.