I have the AX100 and the AX53, the AX100 is my go-to camcorder for weather events. I just purchased an A7RIII and waiting on it to arrive, so curious to see how this stacks up against my AX100. I usually leave the 100 on manual focus though, the auto-focus is good, but I like to have control over my focus and not trust the auto-focus. My only advice is to get an external microphone, the on-board mic is decent, but I've noticed an external microphone makes a huge difference in audio quality. I don't use the AX53 that much, the image stabilization I've noticed is better on the AX53 than the 100, that is really my only observation on that.