Professor Plumb is Diamond Certified

Being Diamond Certified is important and here's why...

Answer: Most companies can't qualify! Companies must score Highest in Quality in customer satisfaction and helpful expertise, a 90+ on a 100 scale, and pass all of our credential-based ratings. By requiring such a high score to qualify, Diamond Certified cuts out mediocre and poorly performing companies. Professor Plumb has maintained their Diamond Certified status since 2013 and we intend to keep it that way. Customer satisfaction is of the utmost importance to us.