By default, the setting of the seat belt is covered by the protection of the seat, requiring bending the side angle concerned down, fortunately easily reversible and finding its place at the juncture of the seats. I also had to calibrate more in the seat, or it seemed too imposing.
The protection file is also too high in my case, which indicates the futility of Velcro fastening located on the junction of the two protections. These two tabs can still be trapped in the seam of the seat and the seat back, which keeps everything in its proper place.
For these reasons, its use spread with Isofix seat in a Ford S-Max / Galaxy. This is a quality product, but suitable for large seats.