Comment by jasongill
What are the flaws?
I've watched the video a couple times and the only thing I can see that it does wrong is the fillets on the handle (and maybe the way it used a spline & sweep for the handle could have been improved but it's no worse than you'd see from a new Solidworks user).
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.