Should you decide to take one, the San Francisco International Airport offers a comprehensive list of providers, while community-built Yelp shares passionate opinions about the best and worst companies.
When two puppies are playing and one gets too rough, a yelp instinctively tells the aggressor that he is playing too rough and the pup will naturally back off or reduce the intensity of his playing.
Yelp, which has city-specific reviews, took steps to separate advertising from reviews by allowing site visitors to read reviews that advertisers have tried to filter out of the listings.
Yelp, online product reviews, and trust.
The system will also look for anything they've written publicly about this place (Yelp, Facebook, personal blog) and which superlatives they used to describe it.