i had ksports on my sedan (it's the same suspension) and i loved them. they lasted for about 5 years and a little over 40k miles before i ever had an issue. only one shock ended up blowing out, and it would've been an easy piece to replace, but i decided to try out a different suspension anyway...which was a mistake haha. the ksports were great and i'd get them again without a question.
you won't get oem comfort with any lowering type suspension. some will be softer than others, but you won't have that same softness as the stock setup. lowering suspension systems have to be stiffer so that your car doesn't bottom out all the time. not only would you bottom out a lot, but it would also handle like crap.
ksports will be noticeably stiffer than stock suspension, but with the damper adjustment, you can make it softer. i prefer a stiff suspension, so on my ksports i had the damper turned up to make them stiffer, and i honestly never had them real soft, so i can't tell you how they are if you turn the damper down real low. i felt it was a well balanced suspension for the car though, and as i said, i'd have no issue getting them again. matter of fact, i'd recommend them!
another plus to them is that they're also coilovers, so once you decide you'd like your car to be lower, all you have to do is lower the suspension, rather than buy new springs and reinstall them all over again. you can also fine tune it so you don't get that boat look, which you can't really remedy other than buying something different and doing the work all over again if you just buy drop springs.
Do you remember what front and rear spring rates came with your K-Sport coilovers ?