Callaway Epic Speed Driver   The release of the first range of Great Big Bertha Epic Drivers back in 2017 saw Callaway catapult themselves firmly back into contention for having the best driver on the market. Filled with new technologies, the driver became hugely popular both in the bags of the average golfer, and the PGA Tour stars. It also felt entirely different than other drivers on the market, with impact producing a soft almost muted feel and an ear pleasing thud. Since then, each new driver range from this superb manufacturer has brought gradual improvements and refinements in both design and aesthetics. These constant advancements have  kept Callaway at the forefront of every golfer\'s mind when in the market for a new driver....