I've asked someone before if she preferred a friend who will tell everything about her straight in her face even if it is the awful truth or a friend that will only say nice things about her full stop.
She chose the second option. She is no longer a friend, sad to say.
To me being able to understand your friend's criticisms and opinions about you is helpful. It may help you improve as a person. It is better having your friends say everything to you than your friends telling other people about things about you. Yet some people see criticism as a personal attack.