Let the experts give you their opinions :

Paul Mirkovich (musical director of The Voice),

Tom Odell (signer, songwriter)

Charlie « Prince » Wilson III (Micheal Jackson Immortal Tour),

Jennifer Stone (KeSha, Tristan Prettyman),

Keith Harrison (producer, compositor),

Lise Harrinton (The   Smashing Pumkins, Adam Lambert),

Jetro Da Silva (artist, producer),

David Benoit (pianist),

Judith Hill (signer and songwriter),

Jonathan Cain (Journey)

Miyuji Kaneto (piasnist)

https://www.youtube.com/watch?v=Oja1nv3EW9w