So my roommate is allergic to every air freshener on this planet, but I needed a solution to the "smell" in my apartment.That's when I got this. It's a gift from God himself.This diffuser is amazing. Easy to control color/water output, small and compact, easy to clean, and outright beautiful. It's great for my apartment; I can finally cover up the totally-not-pot smell that the previous tenant so graciously left me. It's also great for setting up a romantic environment when the significant other comes over. As for people's complaints of it not working, I really recommend contacting the company before you leave a bad review. They seem pretty responsive to me.Just a head's up -- if you have a dog, try not to diffuse tea tree oil, or do it in a place where the dog doesn't go. It's bad for their nervous system. I think it's the same with cats as well, but I'm not sure.