I couldn't be happier with the Smart Scent Air Machine Pro. This HVAC scent diffuser has truly transformed my home into an oasis of relaxation and wellness. With its 850ML capacity, I can enjoy the delightful scents of essential oils for hours without constantly refilling.The nebulizing diffusion system is a game-changer. It ensures that every corner of my large home, which is around 4500 sq. ft., is filled with my chosen fragrance. It's a breath of fresh air - quite literally!The waterless design is a huge convenience. No more worrying about water levels or maintenance; it's hassle-free and user-friendly. The sleek and modern design fits seamlessly with my decor, adding a touch of elegance to my home.This device is incredibly quiet, so I can enjoy aromatherapy without any noise disturbance. Plus, the customizable settings allow me to control the intensity and frequency of scent diffusion, tailoring it to my preference.Yes, the initial cost might seem a bit high, but the Smart Scent Air Machine Pro is a true investment in my well-being. It's worth every penny for the luxury it brings to my home. I can't recommend it enough, and I'd give it more than five stars if I could!