Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great device!

After set up, this thing works great. I had problems with neighbors dogs yapping all night. Not anymore! I mounted on a 2nd story banister and aimed it at where the dogs normally hang out. We sleep real well now. Well, three months after installation, the digital display stopped working, so I cannot reset it (cannot use at all). I am waiting for the seller to tell me what needs to be done. I would have to change the rating I gave this product to 2-1/2 stars now. It may go below that if there is no easy resolution.