I am coming up to the end of my 21 days of being vegan. I would say I have been about 75% successful. I certainly have been vegetarian the entire time, and plan to continue. The veganism has been harder work simply because there have been occasions where I haven't checked the labels properly, and there have been those "extra" ingredients. (And once I completely fell off the vegan wagon with a veggie pizza!) However, I did do 7 days of veganism, so have completed that part of my 101/1001 days.
Another problem I have found is that I can't just afford to replace stuff that we already have, so it is a case of use it all up first, and then get a vegan subsitute. Eating out can problematic as most restaurants can just about cope with the idea of vegetarianism, but veganism just blows their minds. As for having dinner at other peoples' then I think it will depend on who they are, some will cope better with veganism than others.
Hubs isn't completely sure about the veganism. He is supportive up to a point, I just think he feels it is a bit weird. The kids like some of the stuff, and it does mean that the whole family is eating more vegetables.
It is a work in progress. The vegetarianism is just a given now, but I will have to try harder with the veganism.