Kalpa - ICSE syllabus, and hence tougher than CBSE. Plus, all national level exams (once he reaches 10+2) are currently based on CBSE syllabus.
Admissions to Bhavans Road no#45 (atleast till Class#1) is by lottery !!! Donation is Rs.25,000/- (even if you get through lottery). But if you don't and agree to pay more donation (marginally higher, say Rs.40,000/-), you should get it easily.
Also, you can see all people (lower to upper middle class) at Bhavans (because of the low fees, Just Rs.17,500/- per annum !!!, excluding the commutation charges through bus, etc.,), which helps my son to interact/know about different people. If I join him in some costly school, I am sure he will get spoiled (in some way or other) and I don't want that to happen.
Overall, even school doesn't decide our kid's attitude, only we as parents should guide him throughout his life !!!!