Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Mixed Feelings

I have had this product for over 12 years. I have had to replace the pump twice when it failed just sitting (not being used). The only time in the last dozen years the we actually had a power failure and I needed the pump, it worked and saved my basement (the family was out of town). But you need to test the pump regularly to be certain that it is working. The battery charger and pump control seem to work well. The in-use buzzer is very week.