Were I seeing this painting in person as opposed to a picture of the painting on the internet, I might have a vastly different opinion. But as I won't be getting to London any time soon, I can only judge what I'm seeing through the wonder of the world wide web.
As it is, I'm not that crazy about it. It seems dark and if he, as reported, was concentrating on the eyes, he missed the mark. They seem dull and lack the natural sparkle she normally has. The mouth doesn't bother me, nor does the nose, and the hair is lovely, but I'm really disappointed by the eyes. Those are the window to the soul and I don't think he captured that.
But as I said, standing in a different light, looking at it up close, in person, these things might be vastly different and what's missing in a photograph could show up big as life in real time. I'm hoping so, anyway.
For a first portrait it's not horrible but I admit to expecting more. That's my own issue, though. I look forward to future artwork of William, Catherine, and their family.