In my experience the autofocus speed in daylight is fine and it's especially good at focusing on what you want it to focus on, so it's great for birders. The problem is noise-reduction i.e. image quality. Do a bit of pixel peeping and it begins to look like a watercolor painting.

I was lucky enough to get one the day it was released early last year. Fun toy, and great for travel/sightseeing where you often can't use your feet as a zoom, but not even close to 1" type sensor quality let alone SLR.

Saving my pennies for a Sony RX10 III 24-600mm equiv superzoom, thought it's roughly 3 times the price of the P900. Good review here: https://youtu.be/Ad1JDfmyNxI