There are pros and cons of first and third party reviews.
The pros of first party reviews is they filter incomplete/spam reviews.
The cons of first party reviews is that they most likely filter out negative reviews which creates a bias.
The pros of third party reviews is nothing is filtered. It’s 100% honesty from the people.
The cons of third party reviews is that they are subject to troll reviews.
I find Yelp to be very helpful when looking for a place to eat.