I only got one last week in fact. I didn't already have a wired doorbell at the front of the house so I was a bit limited. I got the wireless one that I can remove and charge (2nd gen).
Great job so far. No complaints. It is connected to my alexa account so if someone presses the button, alexa will let us in the house know... plus the phone notification too. Battery is supposed to last a few months between charges. Time will tell on that. Picture is very clear.