I've purchased a 10-liter ultrasonic cleaner for home use. While the first unit unfortunately stopped working during the second wash, I managed to successfully resolve the issue through a warranty claim. After discussing with customer support, they sent me a replacement unit, which has been working well since then. Overall, the cleaner performs as expected and is effective for my needs. Despite the initial hiccup, the experience with customer service was positive, and I'm now satisfied with the product.