Does anyone have a smart security system such as Nest, Ring or anything else? Thoughts?
Yes.
I have two Nest cameras. One is built into the Nest Hub Max, so the viewing is of my living room. The other is currently pointing outside, as we've had some issues with our neighbours so the landlord wanted it there and he has remote access to it as well.
My smart home setup is currently:
Google Nest Hub (smaller one, no camera) - Kitchen
Google Nest Hub Max (larger one, with camera) - Living Room
Nest Indoor Camera (mounted on wall by window)
Google Home (original)
Google Home Max (Living Room, connected to TV via aux)
Google Home Mini (Spare Bedroom)
Lenovo Smart Clock (basically a mini Nest Hub, bedside table) - Bedroom
Nest Thermostat (Mounted in the hallway)
Philips Hue Bulbs (3 in the kitchen, one in the living room, one in the spare room)
Philips Hue Go x 2 (Bedside Tables in bedroom)
My TV is a 50" 4K Philips Ambilight - this has three rows of Philips Hue LEDs across the top and sides, the colours match in real time to what's happening on the TV. The Chromecast is also connected via HDMI-CEC, which means you can say "Hey Google, turn the TV off" and it'll do it.
I'd like to get a Smart doorlock, and a Nest Hello doorbell. The issue with the doorbell is that in the UK, Google won't replace it if it gets stolen, which they do in the US. But I may end up getting one anyway at some point - there's various skins and brackets which you can install them into to make them more covert.