We purchased the 27 step Yosegi 5 sun puzzle box for our son. The box is intricate and beautiful, and works smoothly and perfectly....the feel and sound of the sliding tabs are a pleasure and our son was delighted! The packaging was not only secure, but was also lovely to look at. And the service was exceptional: we ordered the box on January 2nd and were astonished to receive it (in the US) on January 5th. Thank you very much Mr. Oka.