So far so great!  Tonight will be the first time using this adjustable base because mattresses were delivered only today, but all functions are working.  Tried it with mattresses on and it's all still working and feels great!  Especially like the underbed light feature, the zero gravity button, and the Sleep button.  The massage features are to us not needed and we will never use them; it's just a vibration.  Pretty easy to put together.  The only challenge was in hooking the 2 bases together with the provided straps to make them a split king.