TA is pretty close to last on my list for restaurant search. The top of every ranking in any even mildly touristy city is going to be spammed to hell and back. It's basically a list of "where do tourists go who can be preferentially selected into leaving a review?"

(TripAdvisor-owned) TheFork, aka La Fourchette, is the way to go in Europe. The quality of the reviews on that site is impressive, and there are numerous torch-the-unicorn style discounts to be had. Europeans take their food seriously :-)

Also chowhound but it's not always up to date

Chowhound basically got destroyed a few years ago when it got acquired and redesigned into an unusable mess, and now traffic has cratered. Some of the regulars split off into new sites - HungryOnion (mostly SF Bay) and FoodTalkCentral (mostly LA), but neither seems to have the critical mass that Chowhound used to have that made it a useful global resource.