I've got the HSD's on mine. I haven't had the teins to compare, but I can state the ride is sublime, not crashy at all. It feels smoother than my old stock suspension on my first supra (though that would probably mean the shocks were knackered ). It's improved the handling of the car no end. I've had the GEO setup on them and the 19's its rolling on do not present any issues. You'll read loads of comments on here saying that 19's are a big no no, you'll ruin the handling and it'll tramline. Well, that may be the case on a stock suspension setup, but the 19's on mine have no detrimental effect at all. No tramlining, no skittishness, no scary moments whatsoever.