Not sure if it's a "flaw" or not, but I always get stuck on AI + 3D design stuff with there being no dimensional information or control.

How big is that mug? Slowing it down and trying to catch some dim info the initial cylinder has a radius of ~39. Regardless of if that's default inches, that's one hell of a mug.

Sure you can scale it, but it's not great practice to design something and then just apply a scaling to get it to the intended size.

All the dimensions are in mm by default, so 39 mm radius on a mug is about right. For all their flaws, the LLMs do usually provide reasonable dimensions.