load of bullshit, my car has been running bilsteins for 20 years, and theyre definatly not too hard, they are plenty of models of bilsteins, HD and sports are still fine to run on the road, the ones that you probably wouldnt want to run are PSS9 coilover, which i probably will, because i dont even care.
I do agree with them being the best though.
konis arent a waste of money, thats the biggest load of crap ive ever heard people rate them 2nd best to, or equal with bilstein
with what shock is actually better, its down to personal preference, with koni yellows being rigid adjustable and bilstein having a lifetime warranty, really is a tough choice
kybs are a decent aftermarket shock for what you pay for. Best bang for your buck etc, but if you want great stuff, then go for koni/bilstein.