The Levoit Classic 300s Ultrasonic Smart Humidifier is absolutely fabulous! It really is “smart”. The easy to download and operate app powered by VeSync is simple to install and walked me through the setup step by step. The paper directions are very easy to follow also. This humidifier has a very large tan that holds at least a gallon and a half of water. The option of the easy to use aroma pad makes diffusing essential oils so clean and simple. It’s fabulous that I can run this from my phone or Alexa also. I’m so very pleased with this humidifier! The display is also so easy to see and read! There’s even a nightlight option.