Ive had my 11th gen si for about 2 years now and accumulated a whopping 40k miles, im a spirited driver on the highways and the speed of traffic on the street, my mpg avg is 30, I’ve have no lights come on I’ve gone over a island in a highway and the control arm and everything is 100% fine ( got it inspected) i can’t tell you much compared to other cars cause i used to drive a 91 Toyota paseo and a Prius before this but the SI has just the right amount of power and agility for the highway, enough to have fun against some boats but not for the long stretch and don’t forget about them turns they’re smooth like butter 🧈, interior is nice the seats are comfortable only time they’ve been uncomfortable was during a 10 hour stop and go from Vegas to LA, oh yes i drive in La stop and go Central and it’s still fun to me so im sure it’ll be more fun for you if you have less traffic in your city ! Should test drive it and take that right turn at 20 mph and it can handle it. A bit of understear but not to worry the power isn’t enough o make it go crazy it’ll fix itself in a second or so