Hi All. I am planning on taking the family on a Christmas Market river cruise. I am feeling guilty about putting my single son in a Category 1 cabin while the rest of us have ceiling to floor windows, but the price differential is $2000+ for 7 nights. It just seems like a lot..... I was wondering if anyone can relay their experience in terms of was the room warm enough in the winter? It looks to me like part of the cabin is below sea level and I was thinking it might be really cold. Any experiences would be much appreciated.