Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No problems, Big savings

We have a split AC unit so the coil drainpan is in a hall closet in the upstairs.If the drainlines get clogged,the pan will overflow onto the closet floor and eventually saturated the Ceiling drywall in the downstairs foyer.This overflow happened once and cost me $75 and 7hrs to repair.I purchased 2 Sonin 700s,gave one as a gift and placed the other next to my AC drainpan. I'd had it around 14 months when it detected moisture and alerted me.Only the plywood was damp in a small area.The Alarm had paid for itself 3 fold. I vacumed the drainline and when the wood was dry after a couple hours, I reset the alarm.Con: It worked great but because I was home to hear it alert me. If nobody is home, the alert wont help. But,for the price, it saved my neck this time and paid for itself in just 1 event.Otherwise, I would have given it 5 stars.