Product review (3 stars): I've not even used it yet but I know I'm not 100% satisfied.
The item is not as pictured. It has turn button dials instead of flip switches. The product guide and instructions list says it comes with the duct collar assembly, as others have noted, and it should but they did not send it. After 3 phone calls to Amazon and 2 to AirKing, the part is on its way. I was fairly shocked that they wanted to send it as a regular shipment, with 3-5 day delivery. After speaking with a supervisor, the part has been overnighted at no cost. I've not even used it yet but I know I'm not 100% satisfied.