Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cool toy for about 60 seconds...

Works great (as advertised)... but pretty much useless for any practical purposes. The focal length is about 1 mm wide meaning that anything closer or farther than an exact specific distance is completely out of focus. If for some reason you need to inspect the pores of your face at 200x magnification, this is absolutely the ideal tool... otherwise, go for the $300 version of this product and the correct $150 lens for your particular application. But, in the end, I guess you get what you pay for...