In the following, we first give some general information on how to obtain MP2 interaction energies in the CBS limit with PWs (Section II B) as well as with correlation-consistent GTOs (Section II C); thereafter, specific computational details are reported (Section III). We then demonstrate how to efficiently and accurately converge MP2 relative energies in PW basis sets as implemented in the CPMD software (Section IV A) and present the results of applying this approach to the calculation of non-covalent interaction energies of 20 systems from the S22 benchmark set , which we then compare to their (aug-)cc-pVXZ analogues of different sizes X=D,T,Q,5 (Section IV B). In the following, we will call our test subset S22* for brevity's sake. We then search among 13 GTO extrapolation schemes reported in the literature in order to identify those that agree the best with PWs in the CBS limit (Section IV C) and investigate the capability of new, different extrapolation laws (Section IV D). We find that the CBS limits reached with the best GTO extrapolations and PWs show no significant difference, i.e. they do not deviate by more that 0.2 kcal/mol for all systems studied herein. However, it is observed that some residual deviations increase with the system size (Section IV E). Finally, we conclude with some general recommendations concerning the choice of correlationconsistent basis sets for the calculation of correlated energies in the CBS limit (Section V).