Just got this 2 days ago and had limited time using it.
My primary purpose is to use this board to plug multiple instruments (guitar, microphones, etc) into my one input guitar amp. So far, it works with no noticeable issues, at least to me.
The box allows each instrument to have it's own volume output, which is what it's designed to do. I haven't really put it through it's paces yet, so I'll probably revisit this review with an update in the future.
The board itself is metal and has respectable weight, and comes with a power chord and a plug in adapter, so you're in business right out of the box. The instructions are limited, so it's a plug in, play, and make any adjustments.
I bought the 6 input option for $27, so for what I need it to do, I think it's worth the money.