  This is a summary of the discussion in Panel I of IAU Symposium 220 on Dark
Matter in Galaxies. The panel topics and panellists were as follows -- Cusps
Theory: Julio Navarro; Cusps Observations: Erwin de Blok, Rob Swaters;
Substructure Observations: Mario Mateo; Substructure Theory: James Taylor,
Shude Mao. In addition to the talks by the panellists and the discussion among
them, there was a good deal of discussion with the audience. Despite the
differences of opinion expressed I think a consensus emerged, and I try to
summarize it here.
