Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do Not Purchase This Model!

We have a duplex that had major alterations in 2006 using seven Model 1276 in both units (2 in one unit and 5 in the other wired in two separate series). We have had several nuisance--false--alarms (many in the middle of the night and currently writing this review at 3:15 AM) during the past six years but both units have had increasing false alarms this summer. Replaced 5 year guaranteed batteries (Duracell Coppertop) and cleaned with vacuum per instructions for alarms in one unit to see if that was the problem, but had another false alarm two hours later (3 the night before). Do not purchase this Model and not quite sure why this averages 3 stars when over 25% of the reviews claim the same problem. Replacing all of them will be very expensive (approximately $30-35 each) since the new building code now requires combination carbon monoxide/smoke detectors.