Hasn't really affected the straight line grip. Just improved turn in and cornering grip. Found its helped loads with wet corning grip.
If you run -3 degs camber and only hit the motorway then the inner edges of the tyres will wear, but if you track or fast road everywhere then the wear is fairly even accross the tyre.
The thing I notice with the standard rubber top mounts is the flex and bounce in them before the damper starts to work. The solid top mounts allow the coilover to work straight away.