I started solving 5x5 almost 4 years ago. I still love this cube very much because of how buttery smooth it turns and it's fast turning. Both the inner layers and outer layers are really smooth which enables me to turn at a comfortable speed. Compared to the GAN 562 M, which is my currently favorite 5x5, I would say the AoChuang's performance can get really close to the GAN. I get more consistent times on the AoChuang (1:45min - 1:50min) while the GAN gives me either really slow or really fast. Yet, I am still able to get really similar times on both. They're great cubes in my opinion.