I have had the MF8 Four Layer Face-Turning Octahedron for a couple weeks now and have solved it several times. It turns very smooth, actually better than the LanLan three layer FTO. It hasn't popped on me yet, whereas the LanLan center pieces pop out once in a while.

It arrived a little stiff, but well lubricated and it seems I have broken it in some. The stickers are good and haven't had any problems with them as of yet.

If you know how to solve a three layer FTO and you know how to pair edges on a 4x4 cube, you will be able to figure this one out. If you haven't learned how to solve an FTO, I recommend learning the Bencisco method.

It's a beautiful, well made puzzle and a pleasure to solve.