The final set of reviews in today's "Review Roundup" series covers the sumptuous Mercedes S63 AMG, the high-powered variant of what is already one of the world's most covetable luxury sedans.

In their reviews, Fifth Gear and AutoCar both found the S63 to be exactly what you'd expect - powerful, opulent... everything a 525 horsepower S-Class should be.

For more info, you can find both Mercedes S63 AMG reviews below.

AutoCar - A short look at the newest addition to the S-Class family

Fifth Gear - A comprehensive review of the S63 AMG detailing its various strengths and weaknesses