I haven't heard anything on my case. I did raise two SRs, one in January and one in March. The response of first SR was that they need to perform additional reviews on my case. There was no response of second SR. When I contacted congressman of my area, USCIS response was, your case is pending to be assigned to an officer.. Then it was mentioned only in those scenarios one can expedite, then you need to give all the evidences. Waiting time is really painful.......