While prolonged seating is not good regardless of what chair you have, it does make a huge difference what your posture is while seated. The 3D foam gives you that support you need to have to sit straight, upright and not having back pain creeping in end of work day.
The money is well spend on this chair, but I had some issue with the lump support.
It broke twice first time I bothered getting it repaired second time I did not even bother after having the chair for 7 years now and not really making use of it due to be able to sit upright without back rest.
A good office chair is like a shoe who fits perfect, but you only know when you had it for a long time, this one I dread to get rid of one day.