Each episode is an hour. Both Daredevil and Jessica Jones are 13 episode seasons.
Unlike Shield, where some things tie in to the movies are times, these are going to be in their own little 'world' (for lack of a better term). There will be mentions of the movie events (Daredevil was big on the first Avengers, and it's characters), and Jessica Jones has mentioned some of the Avengers as well (Hulk being the last one I remember, but it wasn't by name...just description).
Daredevil was damn good. Some episodes better than others, but great.
Jessica Jones, for me at least, is better. I know some will disagree though.