Using this service adds an extra hour to my journey in France and an extra £30 in diesel and road tolls but is still considerably cheaper than the alternative on many occasions.
The boats are not the most luxurious and the food is usually only lukewarm. Accomodation is often fully booked so you need to book early, however on my recent overnight outward journey my aircraft style sleeper seat was not available due to a change of vessel and I was upgraded to an inside cabin which was very clean and comfortable.

I'm happy with the onboard crew and service (apart from the catering which used to be good.) However as a regular foot passenger I want to keep my small case with me on board. Sometimes this is allowed and sometimes it's denied at Dieppe. There doesn't seem to be any consistency or reason for this. I manage my luggage myself and make sure it doesn't cause a problem for others. There is about a 30 minute wait to retrieve luggage at Newhaven which is unreasonable, unnecessary and very frustrating.

Due to poor weather conditions, both trips were rough sea crossings.
The staff were excellent,especially on the return trip to Le Havre. During
night the sea caused minor damage to some cars and extensive damage
to some Artics and trailers and the staff were excellent in sorting out
their responsibilities. Well done LD Lines!

Severn Sisters not a luxury boat but does the job. Good value for money.
Less busy than other crossings though I don't know why as road communications from Newhaven are perfectly adequate. Same thing on the french side.

Check in was a breeze. Ship was clean and modern and sailed on time. My only gripe was we bought dinner on board and I wasn't allowed to have a tiny bit of side salad but could have had a helping a peas or veg for same price which was a bit silly. Overall though, food was good, but not cheap, as you expect.