Please do not get taken by their ads and claims e.g. 95% questions in PUC were covered in one class .
If you check if there are regular teachers, a regular co-ordinator, a decent classroom with toilets, decent course material, a proper schedule - and you are likely to be disappointed.
Have you heard that in a coaching institute if classes would be held needs to be confirmed few hours before the session, depending on if they could arrange for a teacher for the day - visit their Marathahalli facility and you would have a good idea what they have to offer.