Jeff - you will love this lens, it's so versatile. It feels like a zoom in the sense that you don't feel stuck on a focal length. When you go to frame a shot you are met with lots of choices, landscape orientation, portrait orientation, shift left/right, shift up/down, tilt, no tilt etc etc. it doesn't feel restrictive at all which was my worry when I sold my 17-40 to fund it.
Robb - nice use of the big stopper. I love the cool tones. I've not had as good luck with boats, mine end up moving themselves into a complete blur to the point of being unrecognisable