Hi Anil, It's true that Sonet comes with a Stiff suspension. But not uncomfortable. I never had any complaints from my passengers regarding suspension, but rear seats are uncomfortable due to Less under thigh support and Less shoulder space for 3 passengers. Apparently, the stiff suspension helps to improve the stability at higher speeds and keeps the vehicle agile in corners.
Thanks for bringing up this point. As per the Kia Manual: "After pressing the unlock button, the doors will lock automatically unless you open any door within 30 seconds" You can observe the same in 00:24 of the video.