These are great, you don't really appreciate how much dust etc it takes out of the air until you open it to change the filter and see it absolutely caked on.
I've had the Arlo Pro 2 for the last 12 months and its been great. Installed them myself and everything is controlled by the app. I recommend getting the Arlo solar panels as well though, so you don't have to worry about charging the batteries. I just leave the cameras on 24/7 now that I have the solar panels.