I have used 595RSR as (predominately) wets on the race car, in wet/damp/cool conditions they are very good. In the dry, they are much quicker than the tread design may lead you to believe.
In the dry/warm/hot they do go off quite quickly, but not a " gone off and launch you into the scenery" but just more movement and sliding around.
I agreed they are no R888, A048 etc, but they are a very good all round tyre, if I was looking for a treaded slick type in Federals range I would be looking at the FZ201