I would rate them a step above the Eibach/KYB setup but below any true coilover configuration. The Tein NAs use their S-Tech line of springs which are progressive rate. The reason I say they are better than the Eibachs are because the damper is manufactured by the same company with Teins and so they are probably matched better. Not to mention you get more damping adjustment range with the Teins. For street use this is probably the best type of setup.