I have whiteline's version. The difference is amazing, but agreed. You really only feel it when you really push it through turns, like during an Auto-X or spirited back road driving (at speeds you probably shouldn't be doing). Daily driving, you won't really notice a difference. You also need an alignment after this install.
"We live for a good time, not a long time."
RIP Colin McRae
I have WHITELINE ALK comfort and i noticed a difference immedietly. I find my understeer has been reduced and i can power through the turns better. I do not track the car and i can tell the difference easily, especially under hard braking/cornering