I recently bought these three products of YoungJun MGC:

YongJun MGC 4x4 Magnetic 4x4x4 Stickerless Speed Cube
YongJun MGC 5x5 Magnetic 5x5x5 Stickerless Speed Cube
YongJun MGC 6x6 Magnetic 6x6x6 Stickerless Speed Cube

The first and the second work quite well compared to the price.

The 6x6 is almost unusable, especially the middle movement in any direction:
The filling is kind of could brake or pop out some pieces.

Amazing, expecially at this price.Fast, smooth, controllable.

The e-commerce pledge: To improve the reliability of online reviews, I will post a review of every product or service of significance I purchase, and update the review should my opinion change.

This cube is really fast out of the box, it has has crispy smooth feeling and turning is effortless. the magnets are very nice and it makes the cube more stable and controllable, this is a very nice cube and i definitely recommend it to anyone that wants to start with 6x6 or is already a proffesional