5D II to 5D III users, please share your experience

I post an other similar post, but the title is not clear of what I want, so don't have enough response, so let try again. The title say it all, I would like to know how do you feel going from 5D II to 5D III? I am sure it is very nice with the new focus leave a lone all the other extra, but as a amateur dad doing photography for fun, I am not sure if it worth to spend that extra $1200-1400, depend on how much I get for my 5D II. I guest I should say, for the pro who make money with their gear don't need to explain :). Thanks everyone.