Good but perhaps too messy
Performance was good, but the log was flooded with non-critical error warnings when the ssd was running at its nominal speed (Gen4). I couldn't tell if it was this adapter or my motherboard (asus pro art) that wouldn't handle the speed. I had free m2 ports so I opted for this solution instead and put the adapter back in its box. I'll use it if I mount a gen3 ssd one day - it would handle bridged pcie 3.0 no problem.