I find this most useful after getting into the office after a morning gym session where I'm still feeling quite warm (despite having a shower... I'm not an animal). It does a great job of cooling me down - much better than other USB fans I have used in the past. The weather has picked up over the last few days and some other people in the office have tried it and are going to get one too. Granted, you're not going to get the same air flow as you do from a full-size fan and I am using it to supplement an aircon system that doesn't provide enough cool air in this direction.