That's a pretty good (and unorthodox) way to promote yourself and get some free press. Never really trusted Yelp anyway, too many stupid people pretending they're experts.
I've also noticed some cities are way more into it than others, making it more reliable. Everyone in Halifax, NS depends on it, but when I visit my home Little Rock, AR, it's worthless, even though Little Rock is technically a larger city.
I've had great experiences without reviews or guides, and also with places that aren't supposed to be good.
McDonalds is really popular, but I don't eat there.