When P&O did the Spanish run we had a few hair raising crossings.
Over the past dozen or so years though I think we have only really had the one bad sailing and we do the trip four times a year.
Sad to say though, we have sacked off Brittany Ferries for the foreseeable future due to the few cabins available where we can take Effie the effin' dog. We generally book all the crossings when Brittany Ferries announce their timetable to the 'Club Voyage' members but this year due to illness we were unable to commit ourselves. Tried to book the four crossings for next year only last week........NO PET FRIENDLY CABINS on the dates we requested or anywhere near to the dates we requested. It's going to be driving through France from now on, via the Tunnel. I'll get myself a few extra Yellow Jackets.