I bought a very slightly used set of Eibach pro kit for a vert along with a slightly used set of AGX. People on here will say the KYB, in general, are not good and they fail. However, if you read all their info, KYB states that the AGX shocks should not be installed on cars lowered more than 1.5". Maybe that is why they seem to fail, since lots of people have their car lowered 1.5" or greater.
I like them (Eibach and AGX) so far. Tried multiple settings and you can notice the difference. BTW, I got my Eibachs and AGX for @ $300 shipped. Hard to pass on the deal, so I tried them.