I saw a recent post recommending the Reader Rater system. That system is worthless. After many years of existence, most restaurants have less than 10 raters rating them. There is no control over who these raters are and I will bet anyone dinner that the restaurant owners stuff the ballot box. Those Reader Rater stickers on restaurants touting "top 90th percentile" are a travesty when they are based on five responses, several of which can be the owner.
Finally, the review content doesn't change any more than Chicago Magazine--they are just rehashed under new sub-headings (e.g., restaurants near Belmont El).