The Inos caravan is made by the Fifth Wheel Company in North Wales.
From memory 2011 was probably one of the first years they made the Inos.
There have been several generations since then and they are still made and still have a long waiting list for new ones.
They are very very expensive, have a usual MTPLM of 2800kg and are very solid throughout, meaning they last much better than many other caravans (just as well given the new cost). One bonus is the payload can easily be 400kg.
Construction is pretty much wood-free with the walls, floor and roof being thicker GRP skinned and with thicker more dense cores than other caravans. Couple this with interiors that don't detach over the first pothole and the slideout a considerable weight is inevitable.
They are not completely perfect, but sadly, very few things are these days.
Being made to order and taking over a month to build, despite continuous production over the years there are probably less than 150 in existence (and few of these were exported).
I can't comment on the earlier models but in the case of the later models the slideout makes an enormous difference (yes, we own one).
We also often hear the phrase "I thought they went bust" or similar.
Many people assume the Inos was made by Infiniti, who did indeed go bust, but there was no connection between the companies or their products and I think (but I could be wrong) that the Inos predates the Infinti Genesis.
As the company don't go to the NEC or large shows and as they are a rare sight many don't know about their existence. We didn't and it was pure chance we found out about them.
Being so rare video tours/reviews weren't available to help us, so I have made my own if anyone wants to know more.
Review Part 1
Review Part 2
Update (including reclining seats, etc).