After I installed the new wiper blades (just old wiper blade bend approximately 90 degrees and then pull the pin) I again had a clear view, and that in the truest sense of the word. No smear, no coating on the disc, even at night or dusk is reproduced flawless view. Wow, I was impressed.
I wonder now just why I did not come much earlier with the idea to replace the least 3 year old wipers ;-).
Conclusion: Highly Recommended.
Note: The delivery of the wiper blades is carried out in a 1.5m long, thin box (probably a standard pack size); this does not fit so definitely in the mailbox.