The prints arrived today (yesterday we had an official holiday). As suspected they look very good—at least most of them and for most prints you don't see much difference to prints made from negatives. On some very few shots the focus did miss and there're some not perfect exposed pictures as well. But both sharpness seems to be much better if you have an 11 cm × 17 cm prints and small overexposed areas are not so prominent as well. Mercifully the prints don't seem to be sharpened additionally.
BTW, for all the prints I used the jpegs created by the 20D without any retouching.
