(4.2.7) Piecuch : I have no doubt that DFT will continue to play a major role in the development of multiscale and embedding methods. I have been impressed by the ability of the FDET approach of Wesołowski and Warshel 579 to compete with the considerably more expensive high-level equation-of-motion coupledcluster calculations with singles, doubles, and noniterative completely renormalized triples (δ -CR-EOMCC (2,3)) in accurately reproducing the experimentally observed shifts of excitation energies due to hydrogen bonding. While this question may not belong to this section, and it may very well be that it is even ill-defined, our results obtained in ref.