Is Allianz a successful company?

Could you elaborate on the success of Allianz as a company? Are they known for their financial stability and strong performance? What sets them apart from their competitors in the industry? Are they well-regarded by their clients and investors? Additionally, have they faced any significant challenges or setbacks in recent years, and how have they managed to overcome them? Overall, how would you rate Allianz's success in the financial and insurance sectors?