Low Energy Electron Diffraction (LEED) is one of the most powerful methods to determine surface structures. Analysis of LEED patterns and intensities provides the size and shape of the surface unit cell, the degree of order, and detailed atomic structure with a precision of the order of picometers. To exploit the full power of the technique, equally capable instrumentation is required. SPECS LEED systems together with highly sophisticated acquisition and analysis solutions provide the experimenter with many unique advantages present in no other commercial unit.