The shipment arrived quickly, placed in a cardboard box with no additional packaging material. There was no damage to the unit. FIVE out of five STARS. Although I wasn't able to open the box immediately, I was able to do so on Sunday 9/19. It appears that someone had opened it and plugged it in previously but the filter was unopened. FOUR out of five STARS. I plugged the unit in and it worked immediately. I liked how quiet it operated. I see that it has a maximum run time of 8 hours with selections of 2, 4, and 8 hours - just as well. The indicator lights are blue which would not be pleasant while sleeping. I also liked having to be able to turn off the UVC light and sleep selection.