  We adopt a personal approach here reviewing several calculations over the
years in which we have experienced confrontations between cluster models and
the shell model. In previous cluster conferences we have noted that cluster
models go hand in hand with Skyrme Hartee-Fock calculations in describing
states which cannot easily, if at all, be handled by the shell model. These are
the highly deformed (many particle - many hole) intruder states, linear chain
states e.t.c. In the present work we will consider several topics; the
quadrupole moment of $^{6}$Li, the non-existence of low lying intruders in
$^{8}$Be, and then jumping to the $f_{7/2}$ shell, we discuss the two-faceted
nature of the nuclei - sometimes displaying shell model properties, other times
cluster properties.
