I have the SPEDAO version of this cassette, 11-42 11 speed MTB and have just opened up a refund request.
it's nice, well made and light. shifts great, but after only about 200 miles it's started to click, which developed into a creak. Further inspection one of the point where the sprockets are attached to the carrier has some movement. it's not loose, but there is definite movement under load.
they're only attached using small brass rivets vs large steel rivets holding sprockets on to say, shimano alu carriers.
may be bad batch, but it's a risk certainly.
replacing with a XT shimano one instead