  We perform a model study on the 2-flavor lattice Schwinger model using
standard Wilson and ${\cal O}(a)$ improved Sheikholeslami-Wohlert (SW) action.
We find, that the phase diagram is altered, the critical line shifted closer
towards its continuum value $\kappa_c=0.25$. We find no improvement in the
rotation invariance of meson propagators; the scaling of the Schwinger mass is
considerably improved, high momentum states are not. The additional cost of
$\approx 30 %$ CPU-time is highly justified when calculating masses, but not
for high momentum observables.
