Just bought a 2015 facelift A6 black edition ultra s-tronic and was wondering if anyone had any experience or opinions on a remap or chip for this motor?

To get or not to get? Pros and cons? Anyone got first hand experience? Which one is best?

Superchip / bluefin offer a 32 bhp with torque up to 450 nm and claim a modest 7% increase in fuel economy. Does this increase vehicle or engine wear, invalidate warranties, insurance?

Thanks in advance.