Main points concerning the applicability and achievable accuracy are (i) the choice of the wavefunction method, (ii) the choice of the densities for the different parts of the energy expression, or, related to that, the question of self-consistency between the WF and the DFT part of the calculation, and (iii) extensions to properties beyond the ground-state energy. Several aspects concerning WF-in-DFT have already been discussed in other parts of this review. We will refer to the corresponding sections in the following where appropriate. In particular, we would like to point out that several details have already been mentioned in Section 4.3 in connection with DFET/PFET as developed by Carter and coworkers.