This cube is a nice change of pace for those who enjoy solving the 3x3 but want a small change.
My experience with this puzzle is that it's not anything you would see in a competition, maybe as a side booth though.
The puzzle pieces, the caps, were loose on the one I have. This was sort of annoying when doing an X move (turning the entire puzzle) and... Well gravity happens. Alas, the cap is easy to slide right back into place. I don't like gluing cubes, I've had super glue create an unwanted bandage cube. (Nail polish remover will break it down but could remove the color from stickers)
I love this cube, it's a nice addition to my collection.