I have the Pro system. It is decent HD. You can record to the base unit with a thumb drive, but a theif could walk away with it. Not sure if the Pro 3 has thumb drive recording (I believe it does, but don't know for sure).
It has night vision, and they have compatible add in motion lights I think.
We use ours indoors on entry points. The alarm is on the base unit itself. The cameras have 2 way audio, but we don't use it. We also have a Skybell, which is great too (also no subscription and free cloud recording).
TBH, we leave the alarm off. I get noticed when there is movement, and will check if I know people aren't home.
I move the cameras to "off limit" areas when we have a house sitter or dog sitter. Had a paid dog sitter from Rover bring their dog over without permission and it **** on the brand new carpet in my bedroom, where no one was allowed. Caught it all on camera.
The batteries go a long time without charging. We keep two hard wired to power and switch them with the battery only units when they get low.
We also got a discount on homeowners insurance. The cameras paid for themselves after 3 years.
I'd get the Pro 2 if you want free cloud recording. If you don't mind paying, the Pro 3 is supposed to be much better with resolution and total viewing angle...