Jennifer, for whatever reason there seems to be a sufficient bit of anecdotal evidence out there that people who didn't do so well on Humira or Remicade found success with Cimzia, both in terms of treatment and less side effects. Why that would be the case I'm not sure but maybe the composition of the drug is easier for us and it has human protein as opposed to Remicade.
Tw I found the Humira pen more painful than the Cimzia injection because of the burning sensation of the fast release.
Some tips for reducing injection pain is to let it sit out in room temperature for at least 30 min, don't hesitate with the prick and just penetrate the skin. I find that poking lightly at the skin may not break it and it hurts more, just do it. Pick a really fatty area of your thighs. Take your time with the injection, press very gently to let the solution in. I find these make it more bearable. It will never be fun but its not the worst thing ever.