CVT also accounts for the effect of vibrationally excited states on the location of the variational transition state; however, this does not lead to a large effect on the location of the variational transition state in the case under consideration. Therefore, the key issue at the temperatures under consideration here is the accurate treatment of the vibrational ground state. When the vibrational ground state is the dominantly populated state, the reason that CVT locates the dynamical bottleneck away from the saddle point of the potential energy surface is that -although the saddle point is the highest-potential-energy point along the reaction path -the dynamical bottleneck is at the point on the reaction path where the sum of the potential energy and the zero-point energy is a maximum. Since the effective potential surface of CNEO is already a measure of the potential energy plus the zero-point energy, the dynamical bottleneck can equally well be found by locating the point on the reaction path with the highest value of the CNEO effective potential. As TST calculations are simpler than CVT, the good agreement of CNEO-TST and CNEO-CVT, if also observed for complex reactions, could be a significant computational advantage.