Received a matrix sidecar today from no1bigship.
I bought it because I'd used my friends, I liked the mouthpiece and the feel of the drag. The perc is about as close to the bottom of the can as possible.
I opted for no logo, but got one with a Mobius label baked on. It actually compliments the piece IMO, but I would have preferred it if they got my order correct.
It's a bit janky, but acceptable for the money. There are a few bubbles in a couple of spots, the mouthpiece support is badly formed, and the weld is probably the crappiest work on the piece. There is a tiny chip in the matrix perc, the mouthpiece angle is too low, and the dewar joint is way too deep (possibly more than 1cm).
Overall, it looks decent enough. The matrix perc especially with its 72 holes.
Function wise it is acceptable. The perc doesn't fire very smoothly or evenly, but it still offers a nice balance of minor chug and minimal drag. With open and fast airflow, it will stack, but through my GH it doesn't fire even the top section of the perc. This helps conserve flavour though, so it's going to work excellently as an upgraded worry-free travel piece.