I think it looks great - I love the color combination. It's helpful to see another example besides what's in the book. I was considering making this pattern, too. I used Lamb's Pride bulky for another sweater (actually, the cable sweater from the first S&B) and it turned out extremely heavy, so I was wary of trying that again here. Good to hear about your experience with a different yarn!
What a fabulous project! A great idea, and then you implemented it so beautifully, too. I second what others have said about this finding a wider audience. If you ever wanted to make more, I'm sure there would be a demand!