I had to get these in a pinch (bald S02's and lots of rain / long trip). I am only running two in the rear and I am running the original set of S02's in the front (12k miles).

They don't seem to be that bad. They did feel funny at first but seem to correct themselves (felt a little like jello in the back when on the freeway and turned the steering wheel back-and-forth). They have become pretty grippy and give more warning when breaking away. I thought very interesting though, they come with a 50,000 mile warranty. I know that means they are harder, but they don't seem too bad for a daily driver. Anyone else using these? Comments?