"Whisper Quiet" or "Dual-Ducted" Air Conditioning - reviews?

Have the whisper quiet on ours, and no comparison to the old style. Much quieter. Can you still hear it, yes. Do you have to scream to talk while it is running, no. Does a good job of keeping rig cool, not as much variance in temperature as with the old style with dump opening. Have two 15K units on top, and no difference in height that I can tell from old style.