Stabilising the cubic structure at RT is often achieved through aliovalent doping motivated by increasing the disorder on the Li sublattice. Bernstein et al. postulate that there is a critical amount of V Li which results in an increased configurational entropy on the Li sublattice, thus disfavouring an ordering of the Li sites and stabilising the cubic structure. The large increase in ionic conductivity is often attributed to the slightly shorter distances between the Li sites in the cubic structure and to the partial occupancy of these sites. Several different dopants have been shown experimentally to enhance Li-ion conductivity in LLZO, however the mechanism of the resulting enhancement in conductivity is not well understood. Additionally, reported ionic conductivities are typically not easily comparable between studies due to differences in experimental setups.