Yelp-Do you use it and what are your thoughts?

[NinjaPoodle]

For those of you not familiar with this site, it's a free review site where you can leave a review for just about any business, school, pizza joint, clubs, etc..

I like it for the most part except recently a friend of mine had her review removed by yelp because of another poster who left a bogus review and who had only posted 1 review, ever. My friend has posted reviews 800+ reviews.
Makes me wonder..