Have two patios on our Seismic 4212. simple mechanism, no moving parts to breakdown and great when it rains. It keeps the pets dry and off the wet ground.
I think it's a neat new feature, but I wonder about leaks and the inability to deploy it in crowded CGs with narrow sites and trees. That wouldn't stop me from buying one though.
I've been looking at rigs that have side patio and although its a neat feature, it seems to cut down on the amount of livable interior space you have especially in the area where you eat and relax. The ones I looked at that don't have a patio has a slide out there. Seems to be a big trade off for those that camp in the cooler months just to have a raised platform to sit outside.