Read testimonial by Dr. Heinemann (Friedrich-Alexander-University, Erlangen-Nuremberg, Germany): "In 1987 the Institute of Inorganic Chemistry of the Friedrich-Alexander University Erlangen-Nuremberg established single crystal X-ray structure determination as a routine method using a NICOLET R3m/V diffractometer, which was followed by two SIEMENS P4 (1992) and a Bruker Nonius KAPPA CCD (2001). Although CCD technology enabled us to measure much smaller and weakly diffracting crystals, we are dealing with even more challenging samples these days. After a careful investigation of available microfocus sealed tube systems we decided to continue our successful partnership with Bruker and bought an APEX DUO."