Positives
The royal treasury was practically empty WHE NHE ASSCENDED TH E THRONE
he was a clever politician who took advantage of the dissatisfaction amongst the nobles and the Sultan and managed to usurp power.
He changed his courts to the style of Iranian rulers.
He adopted a blood and iron policy.
Balban established the department of intelligence and spread his spies throughout the country to gather information about all political developments and conspiracies.
Negatives
The governor of Bengal, Tughral Baig, revolted against Balban in the later years. An army was sent to crush the rebellion, but it was defeated. This was a great shock to him and he died in AD 1287.
He was undoubtedly one of the main architects of the Sultanate of Delhi, particularly of its form of government and institutions. But by excluding non-Turks from positions of power and authority and by trying to base the government on a very narrow group,
He made many people dissatisfied. This led to fresh disturbances and troubles after his death.
Hindus were slaughtered and their women and children were made slaves. Balban also punished the people of Mewat with his usual brutality.