I luckily only got is as a mystery cube that i paid about half the price for. The tl;dr it ha very poor quality control.
The whole core is full of stress marks and one corner has stress marks (pictured). The pieces are misaligned and don't lie flat. It catches a lot. The over speed is good and it has average corner cutting. It definitely has a unique feel. Many $10 cubes are noticeably better, even without a ball core (QiYi M Pro 3x3 for example (not the V2)).
Get used to it, happens with like 90% of all budget cubes and a few colours of the qiyi clock, quality control is expensive
It looks like a regular cube to me
stress makers are a pointer of poor quality control. It's better than say Rubik's brand for sure, but that's not much of a standard.