I don't see much wrong with your work here. Good, balanced shape, nice finish. The only thing I would have done different: It appears that there are still some places on the outer edge that are not quite circular. With a dish/bowl of this type I probably would have turned it completely round, i.e. made it a bit smaller. These non-round bits just look odd, they are not pronounced enough to be a feature, so they just distract from what is otherwise a really nice piece. But that's just me.