This doesn't seem all that impressive when you compare it to earlier work like 'g.pt' https://arxiv.org/abs/2209.12892 Peebles et al 2022. They cite it in passing, but do no comparison or discussion, and to my eyes, g.pt is a lot more interesting (for example, you can prompt it for a variety of network properties like low vs high score, whereas this just generates unconditionally) and more thoroughly evaluated. The autoencoder here doesn't seem like it adds much.