I actually bought the Vileda window sucker for my brother, but I have sent back. Since I myself have long been the Kärcher window vacuum cleaners use I had a direct comparison and was rather disappointed from Vileda. Maybe he would have liked better if I had not had the Kärcher, but so are there for me in between worlds. However, one must also say that the Kärcher nearly twice the cost and therefore a comparison is not entirely fair. But I would rather spend a little more money and buy me for a Kärcher.