Actually, my second skewb I ever bought. My first one I bought in the 1990's and I still have it. It uses springs and ball bearings to keep the puzzle in place. The MoYu AoYan is much better. It turns very smooth and makes finger tricks easier. The magnets are much better than the springs and bearings. I tried it with and without the concave caps and I find either way works fine for me. I'm just happy it so much lighter and turns faster than my '90's model.

When you put in the tiles with the dimples it gives you a lot of grip. I would like the dimples to be larger though.
This is a magnetic skewb, but I would highly suggest gluing the magnets in their place. One magnet flew out of my skewb in only a couple minutes of use. This skewb also has a light feeling.

If you want to get a good skewb I would recommend the Xman Wingy over this one.