It's OK. People from Eastern parts can get in at SMVB or Cantonment instead of traveling upto SBC in the peak hours.
What I mean by eastern part is KR Puram, Kasturi Nagar, Domlur, Ulsoor, Vasanth Nagar, Shivaji Nagar, Nandi Durga road, Hosur road (Adugodi etc), Old Madras Road, Whitefield road, and other surrounding area.
For example, if it starts SMVB at 1930 crossing BNC at 1950 and reaches SBC by 2010 and leaves by 2030, it will be beneficial.