We have had the Sharper Image cleaners for years in our home. Recently I purchased 2 of the Bizone 4000 units for my office space at my business. I was so impressed with them that I purchased one for our home (3000 model for $329). The difference was incredible; clean smell, removed odors from cooking and smoking (no need for a lecture) and made the Sharper Image unit pale by comparison.

This weekend we placed another order for a Bizone for the second floor of the home.
Lou K