There is no doubts that Ouro Preto deserves a visit.
The beauty of some churches, specially Nossa Senhora do Pilar and Sao Francisco de Assis, with their mind-boggling golden interiors, and the bucolic early morning views over the town contrasting with the students parties at night offer the visitor a complete pack of culture, South American colonial history and art.
However, Ouro Preto has been preserving its heritage with careleness. First, there is no preservation counciousness, as a historic house in the town's main square recently burned down and a beautiful fountain was destroyed by a truck. Also, the hills surrounding Ouro Preto were dominated by modern and ugly statements, and the once beautiful wide landscapes are now limited to the town itself using the Itacolomi rocks as background.
There are no doubts that Ouro Preto deserves a visit, as it is not so far from big centers like Sao Paulo and Rio de Janeiro, and the region is packed with other sensational destinations, including other World Heritage sites like Diamantina and Congonhas, but bad use is consuming Ouro Preto's charm and beauty.