The concept of Urbania is that urban legends are happening to people around Charlie, while Charlie is part of a new urban legend of his own making. Charlie's neighbor is an old lady who puts her poodle in the microwave. Charlie meets someone who was drugged and had his kidney stolen and so on.
The problem is that the movie does have a single story at it's core-- revenge for Charlie's slain lover. The urban legends woven into the story are inconsequently and distracting. They could have been cut to yield a tighter and more focused movie. The revenge story was very good. It didn't need to be dressed up.
The other weakness to the movie is that it had too much fancy camera work. A little fancy camera work is nice, but too much and I get distracted. I stop paying attention to the movie start noticing way things were filmed. It was very well constructed. However the construction wasn't well integrated with the story.