My kids are students of SBIS and I can see their curiosity of the world grow by the day, which is something rare to find nowadays if we compare to the public schooling system where there is an overly strong focus on exams and memory work at the expense of the child's curiosity.
Coming from the public school system myself I can see the benefits of enrolling my kids to SBIS - they are happy, eager to go to school and most important of all to them, going to school is not a chore but a joy.