Brittany ferries to Spain,

[JONAHHELE]

Used them last year and enjoyed the service. Return loading at Bilbao was difficult, especially for low slung sports cars like mine. I fact even quite standard cars had a problem with ground clearance. Was this just unlucky or is it a known risk? Several other passenger muttered never again, must try Santander.
Would be interested in thoughts.
Like the channel tunnel is it better to book as a high vehicle to avoid being put on the upper decks where the pitch on the way down catches front spoilers ?
TIA.