I am satisfied with the window cleaner. What bothers me a bit, a few strips, which can be seen in full sunlight yet. But that may be due to me. Maybe I need a little more practice. 've Cleaned only twice. However, I must admit that to wash windows even with my usual type, still irregularities were seen. The sun always brings it just to the Tag.Trotzdem I would always recommend the Kärcher window cleaner. The cleaning has lost its terrors. It is quick and easy. No more shoulder pain. I am glad that I bought it. It is worth it.