I bought this to replace a less than 2 year old model that kept throwing a D80 code with timed dry cycle.  It could not fixed because sensory board backordered. 
Assumed with it being a newer model the bugs would have been fixed in sensory board. 
Wrong. This dryer was much worse. The D80 code came up and stopped dryer on every cycle. The flow sense button and clean lint filter button constantly came on. 
We had dryer vent cleaned out in October so knew it was not plugged. 

Had it removed and bought a good USA basic dryer that works great. You can keep the Smart dryers!