Product review (4 stars): bought for my humidifier
the pads are fine and the humidifier is good, but the area I moved to just has very poor water which makes it nearly impossible to use these things. they get calcified in a day. and then they need to be replaced and the unit cleaned. EVERY day. just not worth it to me. but again, the pads themselves work just fine. they wouldn't get so calcified if they weren't doing their job.