I learned this in the service...nobody gets an excellent rating, Above Average is like, the best. Thank you Gwen, both Marta & I were pleased with your cleaning of our teeth. I appreciate the fact that Dr. Katayama checks my teeth out. He keeps trying to convince me to get a bridge, implants, tooth whitening, etc...I'm 62 years old, happily married, have the same teeth in my mouth that were there when I was 20. All I ask that you help me keep what I got & you've been doing that.