Instruct: Classify Amazon reviews into positive or negative sentiment
Query: THE CONTROL BOARD FAILED IN 5 HOURS

The control board failed after only 5 hours of use. Johnson's customer service must be a division of their legal department. I've never heard so many reasons why they cannot or will not honor their "No Queston's Asked Warranty".Johnon's vial levels and squares are the best. But, they are new to electronic levels and need to work on quality contol or design problems.If you need a laser for work and can't afford down time, buy one that has a history of reliability.