Speedboosted
Found missing cylinders
Koni yellow adjustability is not a gimmick. There is significant change in ride comfort, and there is enough difference in cornering grip and composure to notice if you know what to look for. This is at cornering levels beyond where most people's daily driving lives, when you're at least beginning to make the suspension work a bit.
Dial it down for a better ride, up for autocross/road course/canyon running. It's a five-minute job to reset all four including the time it takes to open the hood and trunk (or back seats) and run around the car.
If there's any 'negative' about the yellows, it's that they probably don't tolerate big amounts of lowering very well. Then again, if it's a slammed appearance you're going for, serious corner-carving probably isn't your thing.
Norm
I haven't seen that last part is true at all. Plenty of people without "slammed" cars pull them off and they are dead, or very near death. I gave my Bilsteins 2 years of hard life and they had just as strong rebound and compression when I pulled them off as they did when I installed them. Plenty of cases where Koni's are dead after this timeframe.
If I remember correctly, you ran your Koni's with stock springs? Interesting tactic for performance. Did you finally add lowering springs to them? As you know, it's a flawed design with twin tube internals and an OEM length housing.
You are correct about the ease of adjustment, my MCS are the same way and it's awesome! I'm not here to nut-swing my favorite damper on somebody. I didn't suggest that his only option is a $3k+ set of coil overs and anything less is trash. But the fact is, if you're going to spend $600-800 on a set of shocks for performance, it's silly to not buy Bilsteins.