French phrase
Quel est votre avis sur ~ ?
Meaning
What is your opinion of ___?
When to use it
Used to ask for someone's opinion or impression. The tone is polite while remaining fairly approachable.
Example dialogue
Quel est votre avis sur ce restaurant ?
What is your opinion of this restaurant?
Le service était excellent, mais les plats manquaient d'assaisonnement.
The service was excellent, but the dishes lacked seasoning.