Instruct: Classify Amazon reviews into positive or negative sentiment
Query: BASIC DESIGN FLAW

Forget how this unit works because it has a basic design flaw that will drive users crazy! The front cover has a release button that allows removal of the front cover to access the removable battery. Forget about the release button. You don't need it. just tap the lower left hand corner of the case and the cover pops open! Convenient, huh? No way! This design flaw is a total pain in the ass! And it's not just my unit. I tested two other new, out of the box units and both did the same thing. Simply bad design and no quality testing. Do yourself a favor and avoid this unit at all costs unless you don't mind continually closing the case after it has popped open on it's own.