The chairs are VERY low to the ground, so not easy to get out in and out of for people with bad knees.  Even though it says they are "nearly zero pressure", the foot rest is stationary, so it does not rise as you move the back down.  That being said, they are comfortable, but do not operate like traditional zero gravity chairs. As others have stated, assembly is a bit clunky.  A few descriptions on the directions would not have used that much more ink.