I just got this lens yesterday. My first impression out of the box is that it was very slim! Thinner than my 24-70mm F2.8L (but then it's a zoom lens so it's kinda "Duh of course a Prime is gonna be thinner than a zoom!"). All the reviews talk about how awesomely sharp it is but it has me wondering whether the awesome Bokeh factor makes it seem more so (just like the 135mm). Anyway This is my second L lens and I'm totally stoked!