His wikipedia entry, which has no doubt had the usual battles over sources and bias, reports:
> His foreign policies were centred on anti-imperialism, with his government eschewing all foreign aid, pushing for odious debt reduction, nationalising all land and mineral wealth and averting the power and influence of the International Monetary Fund and World Bank. His domestic policies were focused on preventing famine with agrarian self-sufficiency and land reform, prioritising education with a nationwide literacy campaign and promoting public health by vaccinating 2.5 million children against meningitis, yellow fever and measles
> Other components of his national agenda included planting over 10 million trees to combat the growing desertification of the Sahel, redistributing land from feudal landlords to peasants, suspending rural poll taxes and domestic rents and establishing a road and railway construction programme. On the local level, Sankara called on every village to build a medical dispensary and had over 350 communities build schools with their own labour. Moreover, he outlawed female genital mutilation, forced marriages and polygamy. He appointed women to high governmental positions and encouraged them to work outside the home and stay in school, even if pregnant. Sankara encouraged the prosecution of officials accused of corruption, counter-revolutionaries and "lazy workers" in Popular Revolutionary Tribunals. As an admirer of the Cuban Revolution, Sankara set up Cuban-style Committees for the Defense of the Revolution. Such programs led to criticism by Amnesty International and other non-governmental organizations for violations of human rights, including extrajudicial executions and arbitrary detentions of political opponents.
So large improvements in material conditions for an extremely poor country - but at the expense of political freedom.
> Have you looked at the track record of military coup d'états in history
As so often in history, those who come to power by violence leave it by violence; he was assassinated.