Get this over the official Rubik's cube if you're learning how to solve a cube, whether that be speed cubing or just /solving/. Turning the cube is satisfying and smooth and it allows for a degree of corner-cutting with the rounded pieces making it easier to do algorithms quickly. It also feels like it holds together well, although I've only had it for about two weeks at the time of this review so I can't attest for its longevity.
Overall, the best thing about this cube is that it's cheap! There is really no reason to get the official Rubik's cube when you compare the costs.
If you're looking for a first cube to try, I highly recommend this one.