Took five orders to get one that was a keeper.
First 3 arrived damaged, #4 had electronic problems and #5 finally arrived     
un-damaged and has been working perfectly. After speaking with the MFG it was explained that they changed the electronics which improved the reliability.
Wayfair replaced the 3 damaged ones without any question or hassle and the MFG replaced the 4th one with the new improved model. The unit is great and worth the hardship of finally getting the perfect one.