I bought it to use for photographing the grand children, and to take on holidays, mainly because they make using manual focus lenses simple, and I have a few of those. Face and eye detect using the A/F lenses is brilliant. But for wildlife give me an optical viewfinder over a TV screen every time.
I was happy how it grabbed focus on the Long Tailed Tits, but will stick to taking out the DSLR for the birding stuff for the near future. I may even grab a cropped sensor body again, unless the next batch of Nikon mirrorless get close to the Sony focus abilities.
I like the size of the mirrorless stuff, the number of focus sensors, and the stunning new lenses Nikon are putting out for them. Mine came with a "kit lens" 24-70 f4, razor sharp wide open, ridiculous quality for what it is.