  New advances in experiments on the random-field Ising model, as realized in
dilute antiferromagnets, have brought us much closer to a full characterization
of the static and dynamic critical behavior of the unusual phase transition in
three dimensions (d=3). The most important experiments that have laid the
ground work for our present understanding are reviewed. Comparisons of the data
with Monte Carlo simulations of the d=3 critical behavior are made. We review
the current experimental understanding of the destroyed d=2 transition and the
experiments exploring the d=2 metastability at low T. Connections to theories
most relevant to the interpretations of all the experiments are discussed.
