I definitely see the difference in our bedroom since using this unit. I like it a lot and the atmosphere feels cleaner overall. While This unit is easy to maintain... The only problem is that you do have to maintain it frequently. It does it job well, the air in the room definitely feels better and it is easier to breathe. I am terrible at refilling it so we don’t use it every day but I’m sure it would help. Wish it went longer without need to replenish salt