TripAdvisor. They have their faults and failings, but love them or hate them, they have a natural monopoly.
Likewise, Google Plus may very well be a better personal social media platform, but they're never going to get everyone to migrate off Facebook because everyone else that everyone knows is on Facebook. So are all of their accumulated posts, status updates and cat pictures for the past ten years, which won't all be easily moved over to Google Plus.
So even if it were possible to build and launch a better travel review site, we'd still be stuck with TripAdvisor. The accumulated reviews for every hotel in the world, based on TripAdvisor's status for quite a few years now as the hotel review website, where one automatically goes to check a hotel, or read a review, is worth something and is indeed a valuable database.

Likewise, Google Plus may very well be a better personal social media platform, but they're never going to get everyone to migrate off Facebook because everyone else that everyone knows is on Facebook. So are all of their accumulated posts, status updates and cat pictures for the past ten years, which won't all be easily moved over to Google Plus.
So even if it were possible to build and launch a better travel review site, we'd still be stuck with TripAdvisor. The accumulated reviews for every hotel in the world, based on TripAdvisor's status for quite a few years now as the hotel review website, where one automatically goes to check a hotel, or read a review, is worth something and is indeed a valuable database.
Every time I want to check out a hotel that I see listed for sale by a hotel broker, for example, TripAdvisor is the very next place I look. The broker will tell me things to make the hotel look good and worth a higher offer. The management will tell me things to make themselves appear to be worth keeping and left to do things they've always done them. A client-investor contemplating signing us to a management contract will tell us the things that support his own dream and vision, whether or not either is realistic in the future or grounded in past or present reality. But reading several pages of TripAdvisor reviews and taking them together will give me a pretty good idea what I'm really going to find when I get there, even if I've never visited that city before . . .