In using the "Capture" feature of Mendix to write up user stories, I saw that there is no feature that would enable me to assign a particular User Story to a team member(s) and also eventhough there is a feature that allows you to specify Story points, I could not set the actual Story point once I am done with the task - I mean, you can put "Estimated" Story point at first and then once the story is done either keep the estimated as actual story point or set another one - this could really help in Sprint Reviews.