William, that's a terrific portrait. One thing I notice with these backs, though, is that the results can be made so large, with such fidelity, that it seems like you're standing two inches from the subject and staring at him/her. That's not always the most flattering distance: you start to notice little wrinkles and complexion flaws, not because they're especially bad, but because you usually can't or don't see them, either in real life or in other less-highly-resolved photos. In other words, these backs can show you more than you can normally see, and sometimes, more than you really want to see.
JC