I've had hit and miss experiences with those cassettes, ordered a 11-50 for my MTB and were pleased, good shifting performance and light weight. Second purchase was a road cassette, having trouble with shifts to/from the alu monoblock into the first steel sprocket, the first steel sprocket was wobbling when i first mounted it (A year after my purchase, seller were gone from Ali so warrenty/replacement were out).
Absolutely. It is a hit or miss. Exactly opposite to your experience, I had terrible experience with MTB cassette by Sunshine (both 11 and 12 speed) I just couldn't get indexing done. After I tried every trick on YouTube and elsewhere I gave up and ordered Shimano cassettes and life is infinitely happier since then lol. Surprising because road cassettes worked so well