This was my first speedcube, and to this day, it is my best. The corner-core positioning system is very effective, and it has a lot of customisation features. It's very smooth and fast, and can also be adjusted to be slower, but it's also very loud, and it locks a little. I saw a video of someone combining the corner pieces of the GAN 13 Pro or something with the rest of the GAN 12, and it was an amazing cube, so I assume that the high-end GAN 13 or 14 cubes would be better, but, if I were to get a Bluetooth cube, I would bet the GAN 12 UI, whichever is closest to the original.