I always felt that there was something fishy about Rover reviews, since in my area I couldn't find anyone with a negative review. I then had a terrible experience with a sitter, despite her great reviews and a meet and greet that I thought went well. I was so uncomfortable with the situation that my dog was in that I picked him up before the stay was completed. The sitter canceled the stay and refunded my money - which locked me out of leaving a review. I'm sure that sitters know that this is a way to avoid bad reviews.
When I complained to Rover that the sitter had misrepresented herself on her Rover page and to me and had violated Rover's terms of service, Rover sent back a canned response saying that they find that the best resolutions come from sitters and clients talking to one another - i.e. Rover was not interested in investigating this sitter. When I complained that potential clients need to know about bad experiences such as mine and that I and others in my situation shouldn't be locked out of leaving reviews, they had a canned response for that as well, and when I pushed, said that they would pass my "suggestion" along - in other words, IMO, they are not interested in placing the needs of clients and dogs first. I will never trust Rover again.
Bottom Line: No, I would not recommend this to a friend