I did some prelim testing last night, and it doesn’t track on a mask. So you’d have to do some tracking (or keyframe a mask(s)) and then it works from there.
I don’t know, it seems like a v1 product, it works OK, but I do think that on object removal unless it’s super simple, some paint and roto will still be necessary and Mocha can do a better (and easier in the sense that it is more controllable) job. You also have to paint a cleanplate, as the Ae version is waning you to do with Photoshop. If that is necessary, I’d much rather use Mocha’s superior tracking and roto, and then just plug all that in to Ae. The only thing it has going for it is the A.I. fill, but even that, in my little tests, needs to be super simple. Mocha has tools for lighting fluctuations and pixel rebuild as well, and it works amazingly well.
I am a huge Mocha proponent, and I think Mocha is a great program to learn, with admittedly a steeper learning curve, but it’s well worth it.