I’ve been using these kingspec nvme drives for a little over a year now and have had no issues at all. I have 2 x 128gb’s in my servers and one 512gb in my workstation. They work a treat and I cannot find anything wrong with them. 500gbs are now $100 NZ. Can’t complain for such a price. Buy from AliExpress and sort your search by most orders. Check the feedbacks from other buyers and use your discretion on the seller you choose. Other than that, the drives are good.