I have one and I’m not that impressed really.
I’ll never speak to someone through it, because the speaker is so loud the entire street would hear it. I haven’t figured out if you can turn it down, but from googling it seems to be down to your phone, rather than the bell speaker.
It’s a bit shit if you ever needed to quickly (but quietly) speak to someone through it, by the time you’ve changed your phone’s call volume and connected to the bell, they’ll have gone. Unless you don’t mind the megaphone type voice coming out of it.
It doesn’t always pick up motion when me or dp are coming back from somewhere, so I have no idea if it’s picking up everyone that comes to the door. I’ve changed the range to only pick up motion in our front garden, but it still randomly picks up cars/ people in the road, but sometimes misses people at my door. This is pretty common too, from googling the issue can be down to cold weather apparently.
I am paying the £2.50 per month subscription because otherwise I don’t see much use of it if you can’t view the history. Like a pp says, by the time you’ve connected to the live view, whoever’s there will probably have gone by that point.
I would begrudge paying £8 a month for it (I think this is if you want more than 1 device to store history but I’m not sure).
I’d rather have just got a regular cctv camera to be honest.