The mosque is good, like all the others in the city. There are plenty of mosques in the city (at least where I went). It is very convenient, as the time has come, you can safely pray.
The Beyazit Mosque was built by the Ottoman Sultan Bayezid II in 1500-1506, half a century after the fall of Constantinople. The mosque is located on the square of the same name. Now the mosque looks great both externally and in its interior decoration. It is not difficult to see this during your walk along the Divan Yolu street...