Hey- I have a ceramic nailbomb calibrated set. I really like it so far and im still to unlock its full potential as i havent had it that long. I find its sound to have lots of depth and sounds fantastic through my Mesa. I did find it to be kinda scooped, or to be more specific it has more of the low mids - this isnt a problem when playing by yourself or recording but i did find that when playing in a band context I had to alter my EQ settings to project the mids more as it wasnt cutting through as well as maybe an Alnico V Nailbomb would. Thats the only 'fault' i can find with it, and its not really a fault at all, its just getting used to its particular voicing and what frequencies it emphasis more/less of. And as usual it varies from guitar to guitar. Mine is a PRS SE 24 mahogany body btw.So for me a C-Bomb in 3 words: Tight, Deep, Massive :-)