Benjamin of Tudela's account of Baghdad

While describing Constantinople and Baghdad, I feel that Benjamin of Tudela is unbiased. He praises both cities very much, not seeming to have a preference for either one. He had praised Constantinople for its wealth, diversity, and entertainment. Similarly, Benjamin praises Baghdad for its splendid palaces, and righteous caliphs. Because Benjamin praises both cities fairly equally and doesn't seem to have a favored city, I believe that he is an unbiased source of information.