The SDP is very well documented and easy to use, the team behind it are passionate about what they do which can be seen in how much time there is spent testing the software and answering questions. This would be great if it was more stable and could handle some of the higher bandwidth attacks. For our particular needs its not an issue but I believe this can be improved over time by spending more time developing the product. We've used it internally for testing and using as part of a DDoS mitigation plan.