We have been Viking fans for many years but this was our first sailing on the Sun. Our biggest issue was intermittent sewer odors coming through the ventilation system (not from the bathroom area). Although maintenance and Engineering attempted to resolve, they did not resolve, possibly because this is a design issue or requires a bigger fix than they could do at sea. Either way, Guest Services management was totally unsympathetic and offered no apologies, etc.
One really nagging concern is that we were upgraded from a Penthouse Veranda on deck 4 to a Penthouse Veranda Junior Suite on deck 8. I can't help but wonder if they had previous sewer odor issues with this room and this was their attempt to get by until they could get a permanent fix?
Noise level in this room was unusually loud and apparently came from doors slamming immediately below the room in crew access corridors or ?
See above comments about the unresolved sewer odor issue and excessive noise.