LUX (Large Underground Xenon) is a dark matter detection experiment using a 350 kg dual-phase Xe TPC. It aims at a WIMP-nucleon cross-section sensitivity of 2e-46 cm^2 for a 40 GeV WIMP, an order of magnitude lower than the current best limits. It will surpass all existing dark matter limits for WIMP masses above ~10 GeV within weeks of beginning its science run. The LUX detector has already been tested in its final configuration during a surface run in the Sanford Lab at Homestake in 2012. Light and charge signals were calibrated using radioactive sources and Muon tracks during a 90-day period of stable cryogenic operation. It marked the first successful use of technologies proposed for tonne-scale detectors, such as water shielding and thermosyphon cryogenics. The experiment has finished installation in the Sanford Underground Research Facility (SURF), and is close to starting its first science run.