Product review (5 stars): GREAT HOOD EVEN VENTLESS - BE CAREFUL IF YOU HAVE CEILINGS LESS THAN 8'
I looked for a long time and am very happy with this product purchased through Amazon. What I am NOT happy with is the "short kit" which is a shorter version of the chimney for ceilings less than 8' H which I bought through the company that manufactures this.  At a glance it seemed that the shorter chimney was exactly the same but shorter when in fact the dimensions were just enough smaller that it turned what should have been a 45 min install into a 4.5 hour ordeal.  End of the day it got installed and works very well.  Unfortunately due to all the rigorous energy it took to get the parts to slide together the connection where the chimney and flue meet got loosened and can't be tightened.
I should also mention that ours is installed as ventless / recirculating and it captures and cleans the smoke etc. perfectly.