I agree with nammu. I'm finally stable. I have PTSD too. The ptsd kept me from being stable for a long time. The skills I learned in therapy really helped.

For me stability is, being able to handle life without flipping out. I did finally get my meds right too with a good pnurse. I still get a little depressed in the winter but it's nothing like it used to be. No more hypos tho. But I'd rather be stable now than have them and risk mania or psychosis.

I feel it's a combination of finding the right meds and coping skills.