I'm surprised by the negative reviews about their billing practices and my heart goes out to people who go through frustrating experiences. With that being said, my experience is that this is a great interface for testing how my website looks on different devices. I wouldn't be able to do it without them. My problem has more to do with my site not loading on some of the test results. I'm not sure if it is my site's load speed that is causing the issue. I will optimize my website load time and then come back and edit this review. Other than that I am very pleased with this product.
