YuXin Treasure Box 3x3

One unlock. ONE UNLOCK, and the whole thing pops. I'm sure it's useful, but the unlocking method absolutely ruins it for me.

Best thing to buy

It worked twice, with the well documented struggle to open/close. then it stopped working at all and completely seized close (fortunately empty) making it the most expensive 'novelty' cube ever.
Finally in one last attempt to open it, it actually destroyed the holes in some of the white pieces that it needs to open/close.
It is now in the recycling.
Thoroughly not recommended

It worked twice, with the well documented struggle to open/close. then it stopped working at all and completely seized close (fortunately empty) making it the most expensive 'novelty' cube ever.
Finally in one last attempt to open it, it actually destroyed the holes in some of the white pieces that it needs to open/close.
It is now in the recycling.
Thoroughly not recommended