I think of depends solely on the correct hanging of the lid from the pot, if the coffee is good and aromatic or bland and thin.
When the lid is properly locked, then the front perforated part is mounted a little lower in the pot. Is he latched incorrectly, it stands on the pitcher and locks.
The bulky getting a result that the lid is too high overall, which exerts too much pressure on the spring of Filtereinhängung. The brewing water passes through too quickly and the good coffee extract remains in the ground coffee.
If the cover is securely latched, however, the gap at the spring is quite narrow and the coffee water runs slowly through the coffee powder, which allow leaching of coffee aroma.
I am (after initial mishandling) now satisfied with the coffee and
recommend all dissatisfied Krups coffee machines owners, the "trick" with the glass lid just try it ... assuming you read here again and to have the machine not already disposed of; o).