Blink are ‘ok’ and very flexible because they are completely wireless but you need to understand how they measure their battery life. For starts they use very expensive lithium non rechargeable batteries to get the maximum capacity.
The two year claim is based upon an average use per day of 8 seconds of Live View, 60 seconds of motion-activated recording and 6 seconds of two-way audio.
Or
Standard use is defined as 8,000 five-second events per year (or 40,000 total seconds of video recording, to include Live View usage).
You also have to use the standard setting of 5 second clips to get this, it’s really not a lot in the grand scheme of things. The video quality also isn’t as good as a nest/ring or a dedicated setup.
The Nests and Rings of this word are more expensive and have a subscription attached but have better quality and recording options. Cost of these are pretty high when you look at the total cost of ownership.
A locally recording setup will likely have the highest upfront but will have the lowest total cost of ownership and the highest quality but are more difficult to set up. You can also better match the camera to the location it’s being placed in.