2yrs after installation, the Stayclean gutters work well draining water but their claims were somewhat misleading. See photo. Contrary to their claims, not even a strong wind will blow needles off the gutters..wet or dry. Although it doesn't clog unless ice freezes on it. I didn't have a good experience with the workmanship of the employees (which seems to have now changed their name, maybe they sold? guess my 10yr warranty is void) but the product is ok. Notice the window in the photo...it doesn't open anymore because the gutter was installed in front of it. That's the same spot where water poured down the wall instead of the other direction.