Unique and unusual subject matter. This one displaying rather interesting patterns. If any improvement, I'd leave out the top black and get more of the floor... Good job! Just now I noticed the reflections in the tiles... bump up!
I only gave this a 7 when I was voting, but I'm thinking it's actually one of my favourite images, and might deserve a bump... okay... what's good?... colours are superb, absolutely brilliant, the composition is great, though I think you could have lost some of the black at the top (I think). I also love that this is different... you have GREAT vision. What's bad? Other than the black at the top, I can't think of anything... so... with all that said, how can I not bump it up a point or two... okay... a NINE, which will make it the highest score I've given in this challenge (leapfrog the 2 eights). Well done.
One of the more interesting photos of the challenge. I would probably crop off the top dark area to keep the focus on the porcelain, but that's just my opinion.