Things are heating up around here, so it was a great time to try this out. The first thing I noticed after I turned it on is that its not the most powerful thing. It is a personal device, but that just means the distribution of cool air is very localized. Don't expect to share this, or even cool your entire body, but as long as your keep it aimed at your face, for example, you are good. I think this works best when propped on a desk to keep your upper body cool. Other than that, controls are easy and machine seems dependable so far.