When the full wall slide was introduced on the Fleetwood Pace Arrow, it was touted as being exclusive and Fleetwood held the patent on the technology. It was explained to me, but I didn't see how the combination of engineering moves made it unique enough to win a patent. Now Monaco Corp has one. I'm wondering if Monaco devised their own method, or if they had to deal to use Fleetwood's technology.
Other than some early electrical motor problems, I've not heard of any Fleetwood full wall slide problems. I believe the slide itself is not "new", and the technology was in supporting the roof above the opening.
The high cost of the initial Fleetwood Pace Arrow gas model put it well into the entry level diesel price range, but for its 36 feet, it didn't have all the amenities a buyer might expect in that price range - no washer/dryer, little closet space, the toilet room located in an area where it can be seen from the front and a huge shower unit right at the side of the bed! It was beautiful inside with the nicest decoration I've seen, but not very liveable. I suspect there were not many sold. The later generation models in DP's may be selling better, but I still haven't heard many reports, good or bad, from owners.