The fan has many positive features and few negative ones. The fan is lightweight and is incredibly powerful for its size! The most powerful setting can cool a medium sized living room in less than an hour! I noticed a difference, and I could tell the temperature was cooler by standing in front of the fan. The air seemed cleaner as well! The fan looks attractive sitting on a stand in the room. The only complaint I have of the fan is that it is quite loud at the most powerful setting! I could not watch TV unless I turned the volume up high. This was a problem at night, because my son was trying to sleep. We had to turn the fan down a few settings. On lower settings, the sound is tolerable. You can get used to the sound at the highest level, but it takes time. To solve this problem, I have turned the fan on high when I'm at work. I can't wait to see the results once I return home! Overall, an excellent fan to help control cooling costs.