How efficient is the hybrid system in the Audi A8?

I'm considering purchasing an Audi A8 with the optional hybrid system. I want to know exactly how efficient the system is and if it is worth the additional cost.

The hybrid system in the Audi A8 is highly efficient and definitely worth the extra cost. It uses a combination of both traditional gas and electric power, allowing for better fuel economy and reduced emissions.

As someone who has owned an Audi A8 with the hybrid system for the past year, I can confidently say that it is definitely worth the investment. The system works seamlessly and has greatly improved my overall driving experience.