My DH bought me one at the Des Moines AQS show last Oct.
Because I have arthritis in my hands & have had surgery on a thumb my hands are weak & I couldn't always hold the ruler steady I need help. This thing is a life saver! I can now quickly cut full width fabric, angles etc. w/ease. It is really heavy but I have a table just for cutting so I never have to move it. My friend has a GO but I feel it wastes much more fabric than my system. Just my 2 cents worth.