We like the Adria fixed beds a lot - so much so that a couple of years ago we were within a hair's breadth of signing up for one - the Adora 612DT. It was only that I really took a dislike to the pushy salesman that we walked away. In some ways I regret it, but we still love our current Swift. However, if anyone's selling a decent example then .............................! We could use this layout as my sister and her family use our van - and the children could sleep in the rather sturdy bunks. It's a single axle, too.
The 612DT has a side fixed bed, though, but there is an island model, which almost has an en-suite - shower to one side, toilet compartment to the other.