Just like Yelp reviews give you a glimpse at what kind of experience you’ll have at a restaurant, TripAdvisor now collects airline reviews that you can use when booking with a new airline. You’ll get an idea of what you’re in for so you can be prepared to deal with it, or decide not to book with that airline.
Source: LifeHacker – TripAdvisor Now Collects Airline Reviews You Can Use Before You Book