I've been interested in the drive from Adata literally just released. It uses the sm2262en controller. I was checking google and came across this article https://www.anandtech.com/show/13131/the-silicon-motion-sm2262en-ssd-controller-preview It's an engineering sample. But performance drops off a lot when the drive becomes more full, nobody seems to know what point the performance drops off. It appears to be at least by the 80% full mark though. I had already placed an order for the 1TB version before seeing those numbers. I got in touch with the seller and explained my concerns etc, i was offered to either keep the drive as long as i run a few tests and share the results with them, plus 50% refund. Or send the drive back for a full refund. So send it back, or keep for roughly 90 odd quid.. good price, but not sure it's worth it? Hard to believe that they would release a new SSD that has worse performance than the previous one.