The level of detail it can generate are subjective I guess. As is with everything, we would need to define what a “good” level of detail is.
As for examples, besides the set of examples contained in this forum post you can check out here which would give you a good idea about how to get started.
I found this to be very informative to how mutable the designs are. My current project is to take what was applied here and make a for loop with a tweakable number for the number of stories.