At $2100 and not exactly a walk-around all-purpose lens, it's not a lens I'll be adding to my portfolio any time soon (oh I would if I could), but I'd happily rent it again. Before returning it, I went to shoot my favorite NYC building. This lens allowed me to shoot in a way I never could before. Never mind the blurry sides; look, straight lines!!
This last photo was taken from the backseat of a cab. You can see another building I am quite fond of there blurred in the background.