I have been using this for the last 4 months and my broker is India Infoline.
The system is very simple (I am using a very simple version). India Infoline were not able to guide me probably, but the staff at BSE were very courteous and helped me out to commence trading.
You can have a list of your securities (I think the maximum is 20) that you would like to monitor. You get real time rates, volumes and other details as well. You can edit (add and remove) the list of scrips. You can place orders either on market rate basis or on limit basis.
Regards