Haven't even used it yet it's not UL listed and it's made in China. I'm sure it works great, love the design, feels solid but looks cheap. My FLIR is also plastic, but I can't hear the batteries in my FLIR rattling like the Amprobe. I'm really disappointed with the quality. To be honest a tool like this can mean the difference between life and death if you need it and it seems so cheap that I don't think I would use it in the field, maybe at home.