Hey dcounts!
I wish I had seen this question earlier! I personally was on the Orencia injections. They worked pretty well until I seemed to plateau. I eventually switched to the IV infusion and so far, respond very well to it. I do have varying levels of success each month but I don't experience side-effects.
I hope other community members chime in as well with their experiences!
All the best, I hope your infusions have been going well!