Handy when your motherboard's M.2 slots are already full
Filled, or unusable, my motherboard would have switched the graphics card's pci-e slot to x8 if I'd used the free slot on the motherboard.
But the motherboard had a pci-e slot at the very bottom which didn't pose this problem (on the other hand, the throughput is limited, but that's no longer the case).
In the end, it worked so well that I bought a second one for the other PC with the same motherboard.
We could have done without the light.
I could have done without it if the pci-e lines hadn't been distributed so strangely, I'll choose better next time...