Rubik's Cube Quality

There are pretty much three things you want to look for with rubik's cubes.

The first one is size. You want a rubik's cube that is the right size for your hands. I like mine a bit smaller than normal people, even though my hands are pretty average sized.
Second is cutting corners. How complete does one turn have to be for you to be able to perform the next? A cube that cuts corners can also substantially cut your time!
And finally, pop-resistance. Nothing is worse than solving a Rubik's cube and a piece pops out. Unfortunately, the better quality a cube is at cutting corners, the more it'll pop. Chose which quality you want more.

Dollar store cubes are never high quality.

And smoothness, you'll notice wasn't on the list! Ever cube is smooth when properly lubricated.