On cube4you.com, there are three different types of square-1's. There is a DIY Kit, a $1.99 version, and a Cube 21 Square 1 for $19.35. Which one does everyone recommend?
Go for the DIY kit, the $1.99 breaks easily(according to the description), and the Cube 21 is like a studio cube for the Square-1 instead of the Rubik's cube.