PROS: Inexpensive, works with batteries installed. The lighting is good (not great) inside the tent at night. CONS: weak fan, not enough cooling for one person in a hot tent (or even a cool one), no airflow inside the tent. I've had this unit for about 4 years now and I've used it on several hikes, not because it works, just because it sits in my camping bin and I never take it out. Rschunimagu. But I think it helps in 100 degree California heat and you don't have the energy to wave your hand with a paper fan. I don't even use it for lights, I have the best flashlights from the dollar store. All in all not worth it. Do not buy.