Product review (5 stars): Poor operation UPDATE very satisfied
Have had for 9 months and in MI seemed like it might be working properly although humidity and dew points seemed to not change very much.  Now that we are back in FL I know this thing is not working properly.  The humidity has never gone below 44% even though the local news had it at 16% when fire warnings were given recently.  The other two devices I have were showing low 20's at the same time.  In addition, the dewpoint has never been below 54% even though the local news again has it much lower depending on day of week.  Even in an air conditioned porch it does not go below 54%.  Emailed company and heard "crickets".  Suggest you not buy

UPDATE:  Company contacted me and we reached an equitable solution and they have sent new unit which now shows the dew point accurately.  Am satisfied with unit and in particular the ALL-SUN customer service.