Just installed the Eibachs on my RWD. Rear install was a breeze, the front was a difficult job. The front struts are press fitted to the hub, so to fully detach them you need to remove the whole front brake assembly and hub. Took almost 4 hours to do the whole job. What I found out was that you cannot adjust the front camber but the rears do have the adjustment bolts that will allow for some minor adjustment, I am not sure if there is enough adjustment to be able to get the camber in the rear back to spec but it is better than nothing.
The ride is harder but not annoyingly hard, more like just right and it shows with the improved handling. The rear camber is obviously off now, I haven't aligned the car yet, will go back to do the alignment/camber/caster etc in two weeks once it settles. Will keep an eye out on tire wear though.