Overall, even the best of the Pople basis sets afford larger errors than what is possible to achieve readily with either Karlsruhe or Dunning basis sets but can be competitive alternatives of only slightly lower quality, provided that both diffuse and polarization functions are present. The use of composite sp shells makes Pople basis sets more efficient, per unit basis function, as compared to other types of basis sets, assuming that one is using a quantum chemistry program that is written to exploit this. As such, 6-311+G(d,p) and 6-311+G(3df,2dp) may have a place in the pantheon of SAPT methods for large systems.