I like this. This is the rare case where I would like to see the image centered and the end spools within the frame. I would crop up the bottom a bit. The reflection is nice, but you allow it to dominate the photo; it should simply enhance the main subject.The fact that the spools are not perfect and symetrical really adds interest, but that is the reason that this image needs to be centered; their imperfections, and of course the color, should be what capture the viewers attention. Great idea and your color choices work well.
I was originally going to do spools of thread as well, but I ended up choosing another subject.
I like the colours and the reflections. Nitpicks are that the strands seem unruly and overall the photo is a bit soft.