Hello, since yesterday I drive my Viggen convertible with built-in H&R springs from the Saab center Saarbrücken. I have already covered more than 100km, city, highway and country road, and am so far very pleasantly surprised: despite optically clear lowering and improved driving behaviour at high motorway speeds, the comfort has hardly suffered… of course, you notice uneven ground, but the Viggen was already quite hard, the difference is so minimal that it is my friend I have to add that the results can probably not be transferred directly to other Saabs, since the Viggen has already a sports suspension, as said from the factory, so the springs and dampers are already harder than e.g. with the SE. So with other Saab models I would basically exchange the dampers. I will deliver pictures soon! Greetings and thanks to ViggenRacing, who advised me well! Philip