It's good to be you.TMThat's ambiguous!!! I took it the wrong way at first: I thought they were saying they enjoyed being me, which I was a little offended by.
I've been trying to figure out how to describe the ambiguity. I suppose we could say there's some ellipsis:
It's good [for us / for you] to be youand the ambiguity comes from what your interpretation is of the elided/omitted subject of "be you".
I'm glad they trademarked it. Wouldn't want anyone stealing that slogan!