Mark Webber doesn’t race Porsche cars any longer, but he still helps the German luxury and sports car brand develop them. Webber was given his first go in the Porsche Mission E, and in a new video, he explains his first impressions of the car.

We didn’t expect anything out of Webber’s mouth would cross the lines into negativity, but the retired racer did admit the Mission E felt heavier than most Porsches. Of course, that’s due to the car’s battery pack and electric motors — one at the front, and one at the rear.

Everything else landed on a positive note. Webber called the car a “game changer” and he said the drive reminded him of the 919 Hybrid Le Mans prototype racer. He likened the all-electric driving experience to the 919 since the car was capable of running on pure electricity as well. The driving position reminded Webber of the 918 Spyder.

ALSO SEE: A Better Look at Porsche’s Upcoming Electric Sedan

Porsche has been light on specifications surrounding the production Mission E. We know the car will sport 600 horsepower from its dual-motor setup, all-wheel drive, and a 0-60 mph time of under 3.5 seconds.

The Mission E should go around 300 miles on a single charge, but Porche has also paraded its upcoming fast-charging technology. With the brand’s 800-volt charging system, the Mission E is said to recharge 80 percent of its battery in just 15 minutes.