I have a solitaire which is side load. Takes 2 big horses or 3 ponies. Is 21' long.
On an iveco chassis it's lovely to drive.
However, when looking for previous box, I travelled length and breadth of the country and many boxes I found awful to drive and I walked away even though the actual box may have looked superb!
The hardest thing I have found on many is the gear box. And, just because they are a lorry, the gearbox doesn't have to be sticky and hard to engage.