One stress reliever which can a great passed time @deanliu. As for my feedback below :

Pros :

• The same common Rubik cube it can be interchange but this one is quite different because you can form anything you like whether it can be some 2D shapes, straight lines or even make some combination to make up something.
• It is another way to improve your skills on how you do designing and creativeness. Also it does improve your mental reflexes where you will exercise your brain and develops you hand-eye coordination.
• A good option for puzzle lovers

Cons :

• There are many types of this which you need to select the bigger one to maximize your experience with this product.