The SBS ceramics on the rear needed bedding in properly for a couple of weeks before they felt right for me, if truth be told, but i'm happy with them now.
Don't forget i'm mainly riding to work in traffic though, so bedding in could be done muck quicker if wanted.
They bite and grip well, and are very responsive in traffic so i could quite easily stop millimetres away from a subject with complete accuracy and confidence.
I really like them, but each to their own i s'pose.
I'm very interested to hear you say that the SBS sintered create dust up front, as i wasn't expecting that at all, in fact i'm a bit surprised.
The Galfers i'm using definitely don't cause dust, in fact i checked them again last night and they don't appear to be doing anything at all, no disc wear and the pads still look like new and they've been on there a few months now.
As i said earlier i have a newish set of pads in the garage still so i'm not gonna need any more for quite a while yet anyway.