Mutuelle with Pavillon Prévoyance

The time has arrived to take out a mutuelle to accompany my carte vitale.

Pavillon Prévoyance seem to offer all I need (specific coverage percentages in order to meet the requirements of coup de pouce aid) and have good reviews on TrustPilot etc (typically 4.3/5).

Does anyone have any experience of them in terms of how well they handle claims etc?

Thanks in advance,
Brian