When you mainly boondock, a lot of features in current units don't make sense. Islands in kitchen is one feature that I shake my head at. We've been in windy situations that we feel better with all the slides in while we wait out the storm. Had we had an island in the kitchen, either the stove, fridge or sink would not be accessible. Outside kitchens are another crazy idea as are residential fridges and no ovens. For crying out loud, how do you boondock without an oven for those biscuits and rolls, then after they're baked, using the residual oven heat to warm your space?! Our unit is completely self contained, with solar power and heated basement (ducted to). We don't have thermal windows, but our unit can maintain a 30 degree difference from the outside to in. In addition, it is rated for full time use.