Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fun with Glass

A truly fun piece of glass and I use it as both a toy and a tool. I love to shoot people and objects with it and see what the distortion does to the image, but it's also incredibly useful when you have no room to work or back up. I found it especially useful in the confined spaces of aircraft cockpits. But that fine thread to mount it on the camera drives me nuts! Especially when I'm in the confined space of something like an aircraft cockpit. But I always put it in my kit when on the road.