Some thoughts about user stories and tasks. I think tasks are bad in most cases. Disadvantages are clear:
- It is an additional level of refinement
- Break down user stories into tasks isn’t a pain, but it takes time
- It is less comfortable to measure project progress
Solution? Just create user stories from 1 to 3 ideal days of effort. Sure, for really big systems and large teams this can be extremely hard. But for small to average size projects short user stories are better than user stories + tasks.