The management of the Three Confucian Sites (Confucius Temple, Confucius Mansion, and Confucius Cemetery) isn't great, and Qufu is quite poor. If you stay overnight, there aren't many commercial areas to explore at night; it feels more like a small town.
However, Qufu's connection to Confucius gives it a natural advantage for tourism, and I highly recommend it to tourists who enjoy cultural attractions.
The Three Confucian Sites boast a wealth of cultural relics: the inscriptions at the Confucius Temple, the gates dating from the Song to the Qing dynasties, and the grand mansion of the Confucius Mansion, giving visitors a chance to experience what it means to be a prestigious family in ancient times.
The Confucius Cemetery is the most underrated, but it contains tombstones of the Confucius family dating from the Song and Yuan dynasties to the present day, as well as the tomb of Confucius himself. The trees lining the road from the cemetery gate to Confucius's tomb are all quite old, with some even being first-class cultural relics over two thousand years old!
Emperors like Qianlong, Kangxi, and the Song Dynasty, as well as literary figures like Sima Qian, have all walked the same path we've taken to pay their respects at Confucius's tomb.