Cuben has condensation for sure. It tends to be a wet film. It runs down canopy to edge readily and doesnt seeem to form big drops like some fabric flys do. It still mists in hard rain too.
I had a minor leak above face once where an attachment point was sewn and the seal patch over inside had a tiny wrinkle. During severral hours of heavy rain one afternoon, i watched a steady rivulet of water run down canopy inches from my face. Never dripped.