Slightly understructured, M06-2X turns out to be the best Minnesota functional tested for liquid water. Its D3 dispersion corrected version shows very good agreement for structural properties. Describing the complete picture of water from small to larger clusters, to the condensed phase, is highly non-trivial with DFT, because functionals showing good performance in the gas phase do not necessarily perform well in the liquid phase and vice versa . Very encouragingly, M06-2X has also been identified as one of the most accurate functionals for relative energies of water hexamers 210 and binding energies of 16-mers and 17mers 211 . Furthermore, from the thorough benchmark by Goerigk and Grimme, M06-2X-D3 was found to be the best among 23 hybrid functionals for general main group thermochemistry, kinetics, and noncovalent interactions .