Journalist David E. Davis, in a 2009 article in "Automobile Magazine", noted that despite Nader's claim that swing-axle rear suspension were dangerous, Porsche, Mercedes-Benz, Tatra, and Volkswagen all used similar swing-axle concepts during that era. (The handling of other rear-engine swing-axle cars, particularly the Volkswagen Type I and II, has been criticized as well.) Some contend that Nader's lack of an automotive engineering degree or a driver's license at the time he wrote "Unsafe at Any Speed" disqualifies him as a critic of automotive safety. In response to Nader's book, "Mechanix Illustrated" reviewer Tom McCahill tried to get a 1963 Corvair to flip, at one point sliding sideways into a street curb, but could not turn over the vehicle.