Besides electron densities and interaction energies, the correct description of potentialenergy curves of non-covalently bound complexes is of particular interest. Obviously, the accuracy -both compared to supermolecular KS-DFT and to high-level reference datawill be determined by the approximations used for the NAXC and NAKE. The potentialenergy surface of the water dimer was revisited by Genova et al. . They found that with both PBE/PW91k and PBE/revAPBEK, sDFT is in good agreement with KS-DFT, but in slightly better agreement with CCSD(T) reference data. Thus, there appears to be some error compensation between the NAXC and NAKE approximations that can be exploited.