Just perfect if you take the time!

I was a little disappointed with this cube at first. The rotations were not very fast and above all it was blocking tremendously (nada corner cutting in reverse). I tried but it was loosening the worst of all: it popait all three movements. Then I took the time to change a little (the heart of the cube lubrication and sanding of the protrusions and parts centers) and I do not regret having spent a few hours! In some bourrinant I arrive at the thirty minute and it still should go down :-)
Highly recommended for speedcubers, but others will appreciate its strength!