I studied this for a while, and there might be two things, very very minor, but...something I noticed.
One, on the babies left eye there is a hint of red in the reflection, just barely but noticiable. Two, you may be able to dodge the eyes to make them a shade brighter.
Very much well done, I like it quite a bit. Its very cute, and it seems you really nailed the light. The image is very clean, and crisp, but composed in a way that it holds a soft composition, as babies are best.
There is nothing I can say that I think stands a chance at making this better. I guess I will have to find another one of your images to critique cause this one is just simply job well done.
Lovely shot! What a beautiful baby he is. I love the colours, lighting and composition of this image ..... would also look great in b/w. Not sure about the blue border though........