This product changed me. It's not cheap, it's good quality at a good price. It's very cool and has a long battery life when fully charged. To be honest I expected this to explode in my situation. For me it's 24/7 - literally! My current sleeping situation is under a table with thick curtains around it for privacy, but it also puts my head right next to an all-season heater - it's clear what's brewing. So I leave it on day and night. When I'm getting ready for bed, my neighborhood is always cool and cozy. There isn't much space so I didn't have a large fan, but this one does the job. I plan on buying another one for the summer to take with me! love love love!