I have been a Customer with Psychz for a very long time, I have learned how their DDoS mitigation Works.
Their Mitigation is a self managed solution so you have to setup the Mitigation yourself
Basically their DDoS Protection really works when its setup on your Dedicated Server, Their Customer Support is a little slow but they get the job done over the phone or in a ticket, I would highly Recommend it to any person who may need a DDoS Solution or a Storage Dedicated Server
They are a little expensive but storage is dirt cheap with them