I was one of those worried by the lack of rigidity of June Tailor rulers after seeing how flexible the Binding Buddy was after I bought it online. Despite my misgivings, I bought a Shape Cut Plus and like it so much I've lashed out and bought a Shape Cut Pro and a Diamond Cut (known as the Girl's Best Friend lol).
In Australia they are very expensive. Those three rulers cost me nearly AU$260 (with postage) and they were worth every penny of it(although I wouldn't have said no to lower prices!).