We've had out Roo for three years now, and the only time I remember having some condensation issues was on a very cold night and the windows were shut tight. Now we always crack the windows, plus leave the roof vent on low, and don't have any issues at all.
2016 Roo 21SS
2005 Ford Excursion-Sherman
Mods so far:
PI hardwired EMC, Wire Shelving in wardrobe
Plexiglass screen door protector, Blue LED Wine nook
stairs, and counting...