In brief: The build quality is very solid, the materials neither particularly high nor inferior in any way. All 4 USB ports are working properly (for me) and the plug also are tight enough; ie no plug wobbles in the USB port. The only thing me something is interfering with the orange-lit lamp on top of the mini-hubs. The light is clearly too bright, and I think the product is no added value through a small light received. On the contrary, the light I see it as the only drawback of this mini-hubs. I have something stuck over it, so that does not bother me the light. The extra Stromverbraucht remains; Although very small, but because they wanted to be in my opinion, in the wrong place "innovative". Otherwise, a great product and I'm at the good price more than satisfied!