I have counter height windows and they're bumped out too. I LOVE the extra deep counter it gives me -- I never run out of prep space, and I almost feel as though I'm prepping outside :-)
I would totally recommend counter height and bumped out windows, but watch how far the bump out goes. If it's really deep (mine is 15 inches) it gets harder to open the windows and clean to the back of the counter. I'd keep it to 10 or 12 inches, maybe.
Here's a photo of my window:
PS I like your fridge on the bottom wall much better. The counter space next to the sink is valuable real estate, and the bigger the better, I think.
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Similar layout—remove door to mudroom as in this photo
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