I saw such come up on sale at Amazon and took a look. There is no security added by cameras. That is, it's not overt so it doesn't make the would be burglar think twice.
The model I found missed the mark on other points. For example, it was not smart enough to take a picture when I knocked on or opened the door.
No. It is not good enough.
You guys think wifi video peephole/doorbell is good enough for home security while away ?