I'm using them with the humidifier.
By themselves, I found the moisture to be a bit low, but I tend to run my machines' humidifier at absolute maximum.  I was planning on using these with my machine on a plane without water.<br /><br />But what I have found is that using them with the humidifier the water in the reservoir lasts longer...  Allowing longer between refills.  Handy.
Rating: 4 stars