Well I was in the same sitaution as you were. I went 14 years with just an implant on my right and expected that when I got my left implanted, that it would work automaticly. Boy was I wrong. I am having a very hard time adapting to the left side. However it hasn't hinder my hearing or speech.
First week of hearing out of my left, I was talking quieter than normally. But thats normal anyway. Its like waking up in the morning after a long sleep and go for a run right away... But 14 year sleep for me.
It has helped me hear 360 around me. In stead of one side, I am able to detect the sounds coming from my left or right. Still training though. It will require patience and a very long time I would assume.