I used Care.com a few years back for simple, house/dog sitting on a few occasions (either for vaca or an overnight). The online sourcing was fine. The problem is that they did not guarantee any reservtaions and, living in a college town, all the sitters were flighly, had zero experience with XL dogs, and hardly ever showed up on time or when they said they were going to. One cancelled on me 8 hours before I had to leave for vacation. I did multiple meet/greets and in every case, all the people were fine, happy, willing to commit. Once they left the house, they were just a lost cause. Allow me to say as well, I did not ask for anything but feed/water dogs and house sit. No walking, no poop scooping. I just found this site to allow anyone and everyone to say they are a "highly recommended" pet sitter, which I found to be completely false. I was just dealing with everything except professional and reliable individuals.