We love our 152 although we do think of upgrading to a 172 or 171 every so often when we're at day 14 of a 15 day trip in variable weather.
What we love about our small unit is that we're allowed on the sites usually reserved for tenters and small pop-ups - the ones right on the water with the view.
Plus the large tanks enable us to go to more secluded campgrounds with poorer facilities but more privacy.
There seems to be tremendous interest from other small RV/camper owners from tenters and truck campers to A-liners. t@bs and pop-ups in the smaller r.pods. Most of them seem to want to stay as small as possible but are tired of setting up and taking down their units.