I don't have one, but I see an advantage if you really want an enclosed shower/toilet. For a big guy like me, that shower box would be a challenge to move around in. I actually prefer taking showers outside or at campground facilities. I also think it would be challenging to sit on that toilet for large persons. I think that enclosure takes up a lot of interior living space and makes the interior feel much less "open".
Some cons for me would be that the front storage area sliding drawer takes away too much space. I would rather have an open area without the drawer. I also think the front sink/stovetop/frig set up is awkward. I prefer the midships style with easy access from both sides.
The raised flat roof front section was a feature on Aliner models - one dealer told me that the flat roof section often leaked due to pooling of water where it attaches to the sloped roof.
2015 Rockwood A128S
2010 Rockwood 2604
2014 Ford F-250 CC SB 2WD
2008 Toyota Sequoia 2WD