From my experience, 1D images are very vivid straight out of camera. Colors seems to be somewhat different from newer CMOS based cameras - that is what i like on old 1D.
All A4 prints (8.3 × 11.7) from 1D i have at home are pretty detailed and absolutely no problem to do.
Beyond some disadvantages one can be pretty happy with this camera.
no more discussion, just 1D samples
#1 EOS-1D 1/400 f/2.2 ISO200 Canon 24mm/1.4L