Is Cassius Dio a reliable source?

Cassius Dio is considered a valuable historical source, particularly for the Roman Empire, as he wrote his Roman History based on earlier works and his own experiences as a senator. However, his reliability can be questioned due to potential biases, his Roman perspective, and the time gap between the events he describes and his writing. Additionally, some of his accounts may contain inaccuracies or embellishments. Overall, while he provides important insights, his writings should be evaluated alongside other historical sources for a more comprehensive understanding.