Great review, I just ordered one from Best Buy for $59.99. I couldn't pass it up even with having the DB1 already.
Can you provide the actual address you are using for the RTSP stream(s)?
Mine worked with the transformer that was installed in my home. The power kit is what makes your mechanical chime ring. I would test with your current transformer to see if it will power the camera. If not get a 16vac 30va transformer for ~$20.
Interesting, I did not know there was a motion detection zone setting in the ezviz app. I must have missed it. The only option I get is "distance" which is assumedly PIR sensing.
I have played with it, however not extensively. Behavior doesn't seem to change with the options, outside of adjusting the motion detection within BI affecting that portion of it.