It actually looks a lot better than I'd initially think it would. I love how well that render blends in with the black/white background. That's pretty difficult to pull off.

I also do half-agree with NinthJake. It's generally better to stick with one render, but it is possible to use more than one. The main thing, though, is that different renders should be used, not just the same one zoomed in and flipped horizontally. They both blend very well, but it seems kinda tacky to me when the same one is used twice in the same image. I'd recommend keeping the one on the right and replacing the one on the left. That, or you can remove it all-together.

Lastly, the white lines running across the top and bottom... I don't really like how the blend across the renders. I'd recommend cutting the renders so the line doesn't go through them and just blends on the background. I feel that it emphasizes those parts of the renders through which it runs when it blends on top of them.

Overall, pretty good. I really do like how all the colors (and lack there-of) blend together so nicely.