Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't Bother

This seems like such a great idea, but these levels are not worth the bother. The bubbles are so tiny that it's not possible to get the camera any more level than you can by eye. And my copy was not accurate. Setting the camera level with a real carpenters level left this tiny guy off center.And better yet, nothing holds this thing on but a little friction. One of mine fell off and was lost on the first day out. Great idea, but just does not work.