Is it polite to thank someone by saying that they are “utile”?
I want to say the equivalent of “You were very helpful, thank you”. But I'm wondering whether “Vous êtiez très utile” is too blunt, coming off like “You were very useful”, as if they were a tool.
I'm not sure about the nuance of “Votre aide m'est utile” too. Is it a polite way of thanking someone for their helpfulness, or just a way of telling them that I find them useful to me?