Bykski are killing them! Half the price and better.
I've fitted 2, 7900xtx on MBA cards and they are performing amazingly well.
They're decent, the only thing that gets me with these China brands are the instructions are usually non existent. I did a barrow block for someone recently and the instructions were basically useless. Had to figure out all the pad sizes/thickness myself and the way it mounted was a little jank too.