We operate cryostats optimized for different temperature ranges. Cooling with liquid Helium-4 inside a variable temperature insert allows experiments from room temperature down to 1.5 K. Helium-3 systems cover the 1.5 K to 0.3 K temperature range. With a mixture of Helium-3 and Helium-4 temperatures from 700 mK all the way down to 10 mK can be reached in dilution refrigerators. Each of these systems is equipped with a superconducting magnet. The highest available field is 20 T. In order to serve a broad range of experimental needs, a wide set of sample holders has been developed. They allow sample rotation, microwave irradiation, optical luminescence, Raman spectroscopy, microwave photoconductivity and surface acoustic wave studies.