Ranked in these QuestionsQuestion Ranking
Pro Supercedes unittest
Nose wraps around unittest, adding some more feature and functionality to it, such as SkipTest or auto-discovery.
Pro Minimal boilerplate
Nose tries to keep boilerplate code to a minimum. As such, it's very easy to read and write initial tests.
Pro Numerous plugins available
There's a large number of plugins available for nose which make unit testing easier. Things like coverage reporting, test selection and xUnit-compatible test output can be added through plugins.
Con Too much reliance on plugins
Having lots of plugins while beneficial, also can be a hindrance. Relying too much on them makes developers feel as if everything's being done by plugins which a lot of times are undocumented or have very little documentation.