Presale questions

I have a Arlo netcam aimed at my front door. When it detects motion I do get an alert but it seems viewing the video is slow -about 15/20 seconds. Whats the response or access time with the Ring?my current door bell is the left of the ft door. Is the degree of view 180? That way i get the video of someone walking up the steps to my door. Is the degree of view adjustabl and if so its range?thx.