was having so much trouble with my eyes using the mac air and the Chromebook I had, this has fixed all of that, I was having headaches at the end of the day and a neck ache.  After two weeks of using this one, the most headaches are gone and so is the neck ache.  I still use the mac air and my Chromebook, so I have 3 screens, which helps a lot with my job, but the main go-to is the iMac.  Now I am hoping it lasts for a while.  But I will be honest very few apple products don't.