Sweet. I like the combination of simplicity in shape and complexity in detail - especially the reflections on the 'metal' (the silver reflective bends below the colored transparent ones). The only small drawback I can see is the pretty rough reflection on the top surface of the red part, right in the curve. I don't have that much experience in 3d modelling, but I could wildly guess that the reflected image/texture is quite low-res.
nice job, the only thing i would say is that it might look better if you made the 'n' the same size as the 'u' and dropped it lower than the rest of the text like the 'u' is above the text. otherwise really nice job.