I tried the 4.3 inches of the same brand but I had trouble seeing the information given, the "hard" numbers to see. So I turned to the 7-inch model. I am very satisfied with the product. Received it a week ago, I left Meurthe et Moselle to go to Aubervilliers. he guided me as a chef.Les recalculations are very fast if one alters the path. I recommend this device.