Notably, Řezáč et al. 2018 reported that the double-zeta quality DZVP basis set gave nearly the same RMSE as def2-QZVP, which we were able to reproduce in our own tests. When similar-sized and betterknown basis sets such as 6-31G* and def2-SV(P) were used, the RMSEs increased significantly but there were only minor differences in computational cost. Our results are largely consistent with Řezáč et al. 2018 even though we did not use the custom empirical dispersion parameters they derived for the DZVP-DFT basis set.