I've never bought from a supermarket, but that doesn't mean they're bad. What are we talking about, Felda is not a jet car and you probably don't fly "200 in the city" with him. If the car is used for regular shopping or moving mother-in-law from point A to point B, feel free to. Don't expect it to be of any super quality, but on the other hand, the retail chain would not dare sell something that is not homologated.