First of all I suggest, they change their name. Doctor Color would be more appropriate. Bring in your tortured, comatose hair to Udi, and after life saving intensive care applied by Doctor Udi, it will bounce back to life, lustrous, voluminous and ready to rock.
Udi will never give you promises he cannot keep, nor will he agree to do something you found in fashion magazine that won't work for your hair type, complexion and facial features. He will be brutally honest and will tell you if he won't be able to achieve the desired results right away and will provide detailed explanations why not and propose gradual treatments to restore your hair back to life and its natural beauty. He will not try to sell you anything or push treatments you don't need to inflate your bill. If you don't need highlights and can do with the roots touch-ups, he will suggest just that.
He rescued my hair twice from the horrible color job other hair stylists and I myself inflicted on my tresses, scared to undergo another disastrous " Cali sun kissed look" dye job. I waited for years to come back to Udi after relocating to the East Coast and submitting my hair to expensive yet talentless, unimaginative hair stylists who ruined my hair.
If you add fantastic personality and the sheer fun to be around, choosing Udi and another stylist (I think Mario), who would join Udi in a heartbeat in fun, hair drying sesh (4 hands style) to invest in your appearance would be the smartest decision you would do in the hair department.
Go Udi, the Color Doctor!