My car has it but occasionally I scrape/bang the bottom if I'm not paying close attention (!), but I don't need it on a daily/weekly basis. I'm considering a car that doesn't have it so I'm trying to gauge whether or not it is a necessity. I think I know the answer but thought I'd seek the wisdom of the crowd. I realize that a non-SAS car sits a bit higher than the Standard SAS position -- does anyone notice the difference? I've hard you say the ride is different, though I suspect it's what you get used to. I like the idea of the car lowering at speed, but that's probably a nice to have and adds minimal range efficiency if at all. Cheers!