The QJ is a new type of 4x4x4. It is very similar to the Mefferts brand, only its turning is a lot more "fluid". When it is bought, it's already very good and doesn't lock up at all, but with a bit of use, it get's even better. A smaller 6cm version of the QJ 4x4x4 (Mini QJ or miniQJ) can also be bought. The miniature version may be better suited to cubers with smaller hands. This is a very good cube and is a probably one of the best 4x4x4s on the market.
