Since the individual comfort is mostly about valving and springs (from what little I understand), I should preface that I am running these on a built-up rig (TJM bumper, extra battery, loaded drawers, sliders, roof rack) and running heavy OME springs front and back. I still have my BP-51s on the rear (haven't had a chance to replace them with the Nitrochargers yet), but even on their lightest compression setting, they still feel too firm. The front end, with the Nitrochargers, feels perfect.
Because the valving on the Nitrochargers feels so good for my weight/springs, I wonder if it would have felt too stiff for a lighter vehicle. I know others have talked about them being firm, but they feel softer than the Bilsteins (5100s) that I was running when my rig was otherwise completely stock.
I hope this helps.