Lighting
The 1337 RGB's lighting has its limitations. It isn't as bright as your usual mouse illumination, for instance. In a very bright room, it can be quite subtle, but most people don't play games in very bright rooms. Once the lights go dim, it actually performs quite well.
There is no software, so there are not many customization options, but the manufacturer did provide the usual, most important functions. You can choose between a static lighting, breathing or color cycle mode. The first two can be set to seven different colors, while the color cycle effect—as you might have guessed—cycles through them. You can also simply disable the lighting entirely if you don't like all this illumination.
I have made a video to demonstrate the effects because pictures cannot really do them justice at all. The flickering isn't noticeable in real life, but my camera picked up quite a lot of it.
The lighting control panel is made out of a cheaper, rather thin plastic material. Since the panel itself won't see much use, I can't see this as a negative attribute. The button with the control switch is perfectly fine for the cause; it doesn't require much force to press in, but it is enough for there to absolutely be no chance of accidental actuation. The rear of the lighting panel has two small clips that
can act kind of like a mouse cable bungee.
The 1337 RGB's cable is braided; it is about 1.8 meters long, and the USB connector is gold-plated.
Build Quality
The overall build quality is very nice. I did not find any bumps or uneven parts across the surface. The stitched edge is very consistent; there are no bumpy areas here either. My only concern was that the mouse pad is not entirely flat straight out the box. It needs some time to flatten out completely, which is strange because it comes in a flat box and is not rolled up by default. This is a thing I managed to live with because it flattened out after some use.