After 6 days and probably 20 hours of burn-in (so still another 30 or so hours before they are at their optimum) i'm completely happy with these cables. These have shown me that my previous cables all had deficiencies, as good as they were. The Quintessence has a bass that isn't just louder, but more detailed and full. Bass notes now are closer in fullness to the ones coming from the Rel sub.
Add on to this the fact that that the balance is so much better with these than on previous SHB cables. The treble isn't shouting at you from the forefront anymore, it integrates with the other frequencies nicely.
The level of detail that these cables are letting through is still making me smile as I go through my refence discs. As some may recall, Damien Rice's 'O' is one them, and I know the album in, out and backwards. I thought i'd heard all the music that was contained on the disc, but, when I played it last night, while Damien was singing, Lisa Hannigan could be heard humming a melody in the background. I know some will say that it was always there, I was just paying more attention because of the new cables. However, this album in particular, along with others, I always listen to very closely and analytically, and her humming wasn't audible before.
With the purchase of the Quintessence, my hi fi journey is nearly complete.