Instruct: Classify Amazon reviews into positive or negative sentiment
Query: As pictured and described

Item arrived and is as pictured and described. This is for the replacement of an old detector. Because of the multitude of screw slots in the base I didn't even have to remove the old screws - just loosened them enough to remove the old unit and then attach the base for this unit. It sounded tonight when we overcooked some meat in the kitchen so it does work well.