I would usually start here
Top 25 Cigar
That way I can read what numerous people have to say about it, how they rate construction, appearance, flavor, etc, and I pay special attention to the ones that dish out the bad reviews. Someone saying its a great smoke doesn't help me narrow down what's so great about the cigar, while someone else saying "its a good smoke, but not so great" and lists some reasons why will tell me more about the cigar, and its short comings.
A lot of people think negatively, and for them, as well as my self, it is easier to pin point the flaws in something rather than appraise the total worth based on good points. The negative reviews won't stop me from trying a cigar for myself, but they tend to give me a better perspective on what to expect. i.e. - too mild = good mild smoke, too strong = good nicotine kick.