Tina wanted to buy a microphone for a music performance. She asked the salesperson, Leonard, for advice. Leonard said "I really like Sonic Sound’s microphone. I think it’s the greatest! It’s the one I use when I sing."
Taking Leonard’s advice, Tina bought a Sonic Sound microphone. When Tina had her performance, the microphone did not amplify her voice much and most of the audience could not hear her. She was incredibly disappointed.
Did Leonard breach an express warranty?