I have gone to chiropractors most of my adult life for back and neck (migraine) issues.  I cannot give this pillow enough accolades.  I bought the mid-core, standard pillow because I am more way more comfortable with a firmer pillow.  i think the less firm pillows tend to lose their support quicker.  I have been sleeping on chiropractic pillows for a very long time, but I absolutely love my Tri-Core and wake up feeling very rested, knowing I had a good night's sleep.  I am so glad I found this website because now I will never have to worry about where to buy another pillow when it's time for a new one.