The 35/f2.8 is about where I expected it to be sizewise, and after handling/lusting a few around the shops it makes a sweet handling pair.
The 50/f1.8 not so much... Not saying it's too big, but compared to existing full-frame medium-fast 50's (there's a lot of them around) it's certainly not small, and to me the long-skinny design make it feel bigger in practice than it's weight/volume would suggest (in much the same way as my CV Nokton 25mm).
That said, they don't seem to have skimped on quality and I'd quite happily take one home
The 55 is light, premium build, optically outstanding, weather sealed. Considering all this, I doubt any of the FF medium fast dslr lenses can compete with it.