Like Watson(JohnG) I had a Carver/Truma and had a bad experience of their customer care.
Having my van serviced a week before going away the mechanic found a cracked lever which promptly fell in half as he tried to dismantle the mover. No worries he said, they will send me one by Tuesday, this was a Friday.
Sorry they said, the factory is closed two weeks for stock taking and nothing goes in or out of the factory. They did explain that if the stock taking finished earlier they would get the part off to me. Needless to say we had to cancel our trip away because we couldn't get the van off the drive.
Having bought a new van this year I had a PowrTouch fitted simply because of all the positive posts I've seen about them in different forums and never having seen a negative post which means a lot because people, usually, are more forthcoming about complaints than good service.
If anyone owns a Truma just hope that it doesn't go wrong in July, the height of the holiday season, because if so it's tough doo-doo.