  Dynamical, metastable supersymmetry breaking appears to be a generic
phenomena in supersymmetric field theories. It's simplest implementation is
within the so-called "retrofitted O'Raifeartaigh Models". While seemingly
flexible, model building in these theories is significantly constrained. In
gauge-mediated versions, if the approximate $R$ symmetry of the theory is
spontaneously broken, the messenger scale is fixed; if explicitly broken by
retrofitted couplings, a very small dimensionless number is required; if
supergravity corrections are responsible for the symmetry breaking, at least
two moderately small couplings are required, and there is a large range of
possible messenger scales. In gravity mediated versions, achieving $m_{3/2}
\approx M_Z$ is a problem of discrete tuning. With plausible assumptions, one
can't achieve this to better than a factor of 100, perhaps accounting for a
{\it little hierarchy} and the surprisingly large value of the Higgs mass.
