@Stephanie
I prefer to let Reviews speak for themselves.
Hence from over 300 Reviews I've only replied to about 20.
These are more or less divided between necessary corrections of important factual details or useful explanations, (i.e. location of underground & explanations about parking) what I term positive input; and conversely, responses to very few negative or intended harmful reviews that require a detailed response.
In a few of the latter cases, I've asked Airbnb to intervene and have the Reviews deleted. CS saw eye-to-eye with me a few times to delete certain Reviews.
Otherwise, in perusal of other Hosts' Responses, I must confess that I am perplexed by those who are in the habit to use Response to further thank Guests or say how wonderful they were, etc. I really don't see what it adds to the Guests' Review, especially when Response is predominantly for one's own audience (i.e. prospective future guests). In short it seems a bit redundant and syrupy.