Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Could be a lifesaver---

This system has lots of features and seems reasonably well-built. Radio reception is mediocre especially on the weather band which is a definite weakness but if you work with it, decent reception is possible. The unit is big and heavy but having a built-in power system necessitates a battery of this size. Otherwise, all features seem to work as advertised.