I only have a W120. After reading the reviews I had higher expectations. At first it seemed like he had done a good job. It sucks well, works smoothly, goes from turn to turn. However, as the sun began to hit the window, I noticed streaks everywhere. The stripes become more visible from the outside after cleaning the windows. To minimize streaks, wash first with yellow (dry) clothes, then with gray (wet) clothes, and then with yellow clothes again. Even the window is clean, you need at least…