Yes I am using Star track and its the only best tracking service i have experienced so far after C track.
Their country manager Asif Sheikh is a very competent person and a reliable source.
The nation wide serive is offered at 5000 rs. but i got that for 4000 after a little bargain. My car's batter was going low and they informed me 3 days before it'd have totally gone out.
They call me immediately as soon as i try to leave the city and keep informing me depending on the locality of car if out of station.
Their helpline is 111112112