  The semi-phenomenological improved holographic model for QCD is confronted
with data of the pure glue, large-Nc gauge theory. After fitting two
phenomenological parameters in the potential, the model can reproduce in detail
all thermodynamic functions at finite temperature. It also reproduces in detail
all known spin-0 and spin-2 glueball observables at zero temperature and
predicts the rest of the 0++ and 2++ towers. A similar two parameter fit in the
CP-odd sector postdicts the correct second 0+- glueball mass, and predicts the
rest of the 0+- tower.
