Dear Yaw,
Thanks for the detailed information. Now I am quite tempted to move to ODK central. I remember, I was one of the user of the beta version of central and since the tool has been released, I couldn't manage to try it, as I am not very comfortable with new things. But I think, this is time to move on and since I have many supportive friends in the community, hope it will not be very difficult to get into it.
Thanks again,
Imran