I have tried both warm and cool cool I found really poor they altered the temps when on until the tsats caught up and never seemed to keep it up long enough. I have a large version of the link you posted and like it a lot I went bigger not as my space is bigger but the reserve tank is bigger less time filling. The cool mist ones should be cleaned everyday especially the type with the warming feature to keep the bacterial levels under control. The warm wist ones should be regularly too I do mine every 5 days to keep the scale at bay. The warm mist type don't spread so much bacteria as it is steam failure to clean it is just power bill issue not a health one.