  We discuss our implementation of dynamical Ginsparg-Wilson type fermions
using a stout-smeared chirally improved Dirac operator. Such operators have
been studied extensively in quenched calculations within the
Bern-Graz-Regensburg (BGR) collaboration. Here we discuss the development and
testing of the Hybrid Monte Carlo algorithm with this Dirac operator. We study
the chiral properties of this operator in a dynamical setup, comparing, e.g.,
the spectra of the operator for the dynamical and quenched cases. We then
discuss quantitative features of the algorithm like autocorrelation and
performance.
